Why Would Anyone Do This for Free?

What moves Wikipedia’s unpaid, volunteer editors

Photo by Giorgio Trovato on Unsplash

Spend enough time around people who build free knowledge and you will eventually field the question, usually from someone who finds the whole thing a little suspect. Why would anyone do this?

Andrea Forte and Amy Bruckman, among the first researchers to study Wikipedia’s contributors at close range, ran into exactly that reaction.

When they mentioned interviewing volunteers who spent as much as thirty hours a week researching and writing an encyclopedia that handed them no byline and no paycheck, listeners kept asking the same baffled question, and the missing credit only made the arrangement harder to believe.

The puzzle has a respectable economic pedigree. Standard theory even has a name for what ought to happen here: the free-rider problem. Mancur Olson argued in 1965 that a rational person has little reason to help produce a shared good they can enjoy whether or not they pitch in, so voluntary effort toward public goods should always run short.

Peter Kollock turned that expectation on its head in 1999. Online interaction is relatively anonymous, he noted, with no central authority and almost no way to punish a free rider, and given all of that, the genuine surprise is how much real cooperation the internet sustains, noise and all.

Yochai Benkler sharpened the same observation. In a 2002 paper whose title tipped its hat to Ronald Coase, he named a third mode of production he called commons-based peer production, a way of making things in which neither the contributors’ motivation nor their coordination flows through market prices or managerial command. His leading example was free and open-source software, where loosely organized volunteers were, in his phrase, beating the best-financed firms in the world at their own game.

By the lights of orthodox economics, the people who write Wikipedia, file open-source patches, and classify galaxies in their spare time are doing something they should not, or at least that should not scale. It scales anyway.

What contributors say moves them

The first wave of evidence came from simply asking. Volunteering had been studied for decades, and psychologists had a tested instrument for it: the Volunteer Functions Inventory, developed by Gil Clary, Mark Snyder, and colleagues, which sorts the reasons people give their time into six functions, among them the expression of values, the satisfaction of understanding something, social belonging, and career benefit.

In 2007 Oded Nov adapted that instrument to Wikipedia, adding two motives the original framework had no slot for: fun and ideology. He surveyed a sample of English Wikipedia editors and found a clear ranking. Fun and ideology came out on top, values close behind, and career, social, and self-protective reasons at the bottom.

Editors rated ideology, the conviction that knowledge ought to be free, as a leading reason for showing up, yet stronger ideological conviction did not predict doing more of the actual work. People meant what they said about their principles; the principles just failed to govern how many hours they logged. Nov’s phrase for the gap was that talk is cheap.

Larger surveys by the Wikimedia Foundation and UNU-MERIT echoed the smaller study. The foundation summed up its 2011 results in a sentence: its editors do it for fun.

Those same surveys carried a less comfortable detail about who the editors are. The 2010 UNU-MERIT study put the contributor population at roughly 87 percent male and clustered in its mid-twenties, and the foundation’s 2011 survey found a similar skew. That imbalance shapes what the encyclopedia covers and who feels welcome to write it.

The pattern held well beyond Wikipedia. Karim Lakhani and Robert Wolf surveyed 684 developers across 287 free and open-source projects, expecting to confirm the conventional wisdom that career rewards and other external payoffs did most of the motivating. They found the reverse.

The strongest and most widespread driver was enjoyment-based intrinsic motivation: how creative a person felt while working on a project, the absorbed state the psychologist Mihaly Csikszentmihalyi called flow.

Writing code that was intellectually stimulating and improving one’s own skills topped the list, and about a third of respondents named the belief that source code should be open.

Their most useful observation was that these motives coexist rather than compete. Roughly two in five respondents were paid to take part, and a paycheck did nothing to stop a developer from also caring about the politics of free software or the plain pleasure of the craft.

Citizen science produced its own version, with a different emphasis. When Jordan Raddick and colleagues surveyed close to eleven thousand volunteers from Galaxy Zoo, the astronomy project that invites anyone to classify images of galaxies, the most common motivation was a wish to contribute to real scientific research.

An earlier pilot had turned up the same leading reasons, among them a simple interest in astronomy and a sense of awe at the scale of the universe. The dominant pull here was participation in a project larger than oneself, the chance to do work that counted.

The reasons people offer for their unpaid contributions run to the intrinsic and the value-laden: enjoyment, the pull of a cause, the meaning of contributing. External rewards like career advancement appear, but only in supporting roles.

The weakness is that such findings rest on self-report, and people make unreliable narrators of their own behavior, as Nov’s ideology result hinted.

What contributors actually do

The most revealing turn in this research came when economists stopped asking and started measuring. In 2013, Yann Algan, Yochai Benkler, Mayo Fuster Morell, and Jérôme Hergueux recruited a diverse sample of 850 Wikipedia contributors, had them play a set of well-established economic games designed to expose social preferences, then matched each person’s behavior in the lab against their actual record of contribution to the encyclopedia.

The games separate different prosocial motives. A dictator game measures pure altruism, the readiness to give with nothing expected back. A public goods game and a trust game measure reciprocity, the readiness to contribute on the condition that others do the same.

The results cut against the sentimental picture. Editors’ field contribution levels tracked closely with their reciprocity in the public goods and trust games, and with their demonstrated concern for social image in the community.

They showed no relationship to altruism in the dictator game. The people building the great altruistic project of the open web were not, on the evidence, behaving altruistically in any technical sense. They were cooperating conditionally and minding their reputations.

That is a sturdier foundation than charity, because reciprocity and reputation both answer to design. You can build systems that make contributions visible, that let people watch others carry a share, and that let standing accumulate over time.

Why motives take hold

Deeper theories explain why intrinsic and reciprocal motives find such fertile ground in these projects. Self-determination theory, the long-running research program of Edward Deci and Richard Ryan, holds that intrinsic motivation thrives when an activity meets three basic psychological needs: autonomy, competence, and relatedness. Open knowledge projects meet all three at once.

Contributors choose their own tasks, with no manager handing out assignments, which feeds autonomy. They build visible skill and watch their edits take effect, which feeds competence. They fall in with people who care about the same obscure things they do, which feeds relatedness. A Wikipedia article or a software patch is an almost perfect vehicle for intrinsic motivation.

Forte and Bruckman supplied the mechanism behind recognition. Borrowing the idea of a cycle of credit from the sociologists Bruno Latour and Steve Woolgar, they argued that Wikipedia runs a reputation economy patterned on the scientific one. A working scientist turns results into publications, publications into reputation, and reputation into the means to produce more results.

Wikipedians have no formal bylines, and credit circulates anyway. The edit history records who did what, user pages double as informal portfolios, and contributors learn to recognize one another’s serious work. Anonymity on the surface rests on a dense layer of recognition underneath.

Kollock had already charted the social motives this implies. Writing about online cooperation in 1999, he picked out anticipated reciprocity, the expectation that contributing now earns help later; recognition, the wish to have one’s work seen and valued; a sense of efficacy, the satisfaction of having an effect on one’s surroundings; and communion, an attachment to the group itself.

These are the currencies of what anthropologists since Marcel Mauss have called a gift economy, where giving builds bonds and standing rather than draining the giver. The contributor gets paid in a coin that isn’t money.

Benkler’s own contribution was to insist that none of this would amount to much without the right structure. Peer production works, he argued, because networked technology drives the cost of coordinating volunteers close to zero, and because the work breaks into pieces of wildly different sizes.

That granularity lets a passing reader fix a typo while a devoted editor writes a featured article, each giving in proportion to whatever motivation they bring.

Aggregate enough small, self-chosen, intrinsically motivated efforts and the sum can rival a corporation.

The scoreboard: gamification

Wikipedia’s reputation economy runs mostly out of sight. The credit is real, as Forte and Bruckman showed, but you have to read an edit history or notice a barnstar on a user page to find it. Stack Overflow, the question-and-answer site where programmers solve one another’s problems, took the same currency and printed it on the wall as a leading number.

A useful answer earns its author reputation points when others vote it up, badges arrive at milestones, and reputation unlocks privileges by degrees: first the right to comment, then to vote, then to edit other people’s posts, then to help moderate the site. The design is widely described as a gamification of the ordinary Q&A site. Lena Mamykina and colleagues, studying what made it the fastest such site of its era, traced its speed in part to this machinery, which rewards a fast, good answer with visible standing.

Kollock had named recognition and efficacy as drivers of online contribution, and the Wikipedia experiment had shown that concern for social image predicts how much people actually do. Stack Overflow removed the ambiguity. Where a Wikipedian accrues a diffuse standing that an outsider would struggle to read, a Stack Overflow user carries a single legible score. The gift economy was the same as ever; it had a leaderboard.

The scoreboard amplifies the recognition motive in the people who already have it, and the rest of the contribution still rides on the intrinsic reasons the surveys found.

A reputation point is esteem made countable. It spends only inside the community that issues it, which is exactly why it can amplify the motive instead of poisoning it. Stack Overflow gamified the gift economy without ever monetizing it, which raises an obvious question: why not just pay people?

Why “for free” is the point

Here the puzzle turns inside out. The question assumes that paying contributors would help, that money is the natural fuel and its absence the thing to be explained. For work of this kind, a large body of research points the other way.

The phenomenon is called motivation crowding, and its lineage runs back to Richard Titmuss, who argued in 1970 that paying people for blood could corrode the civic duty that led them to give freely, and might shrink the supply instead of growing it. Psychologists found the same effect in the lab. Pay someone to do a thing they already enjoy and the external reward can crowd out the internal one, so that an activity once done for its own sake becomes work they will do only for cash.

A meta-analysis of well over a hundred experiments by Deci, Koestner, and Ryan confirmed that tangible rewards reliably weaken intrinsic motivation under common conditions. The economists Bruno Frey and Reto Jegen gathered the field evidence and formalized it as motivation crowding theory, with the careful proviso that incentives sometimes crowd intrinsic motivation in rather than out, depending on how the reward is read.

Dan Ariely gave the effect its crispest demonstration. With James Heyman, he had people perform a dull, repetitive task under three conditions: a sizable payment, a token payment, and no payment at all, the last framed as a favor. The token-payment group did the least work. The unpaid group, asked simply to help out, did the most, outworking even the well-paid one.

Ariely’s reading is that we run two operating systems. Social norms govern favors, family, and community, and they are generous and warm. Market norms govern transactions, and they are precise and self-interested.

The two refuse to blend, and the moment money enters the frame, social norms slip out and people begin to calculate.

His favorite real-world case involved AARP, the membership group for older Americans, which asked a panel of lawyers to help needy retirees for a discounted thirty dollars an hour and was turned down, then asked the same lawyers to do it for nothing and got an eager yes.

This dissolves the puzzle instead of deepening it. The unpaid, byline-free character of these projects keeps the work inside the social economy, where meaning and reciprocity and identity are the going currency, and away from the market economy, where a few dollars an hour would read as an insult beside a professional’s market rate. The missing paycheck is part of the design.

Crowding out is conditional rather than a law of nature, and Frey and Jegen are explicit that rewards sometimes strengthen motivation. And Lakhani and Wolf’s finding that paid and intrinsic motives coexist among open-source developers shows that money and meaning are not always at war.

The clearest summary is more useful: reframing a freely given contribution as a paid transaction tends to spoil it, and the volunteer character of these projects protects the very motives that keep them alive.

The motives are real, and they can break

If the puzzle is why people begin, a harder question follows: why they stay, and why they leave. The most sobering finding in the literature is that the motivation everyone marvels at does not sustain itself; it depends on how the community treats the people who carry it.

Aaron Halfaker, Stuart Geiger, Jonathan Morgan, and John Riedl traced what happened to English Wikipedia as it grew. To defend quality against a rising tide of newcomers, the community built steadily more aggressive machinery for catching bad edits: automated tools that reverted contributions on sight, and a thickening layer of rules that newcomers found harder and harder to shape. The machinery worked, and it backfired.

Good-faith newcomers whose first edits were reverted by an impersonal tool, often with no human word of explanation, proved markedly less likely to ever edit again. The defenses built against vandalism were choking off the very contributors the project needed, and the active editor base slid into a long decline. Later work by Nathan TeBlunthuis, Aaron Shaw, and Benjamin Mako Hill found the same pattern across hundreds of independent wikis, which marks it as a general property of these systems rather than a quirk of Wikipedia.

Lay this over self-determination theory and the damage reads clearly. Reverting someone’s work without explanation tells them they are not competent here. Meeting them with an automated rejection in place of a person denies them belonging. Locking them out of the rules strips the autonomy that made the work feel like their own.

Motivation is less a personal trait than a relationship between a person and an environment, and an environment can be made hostile.

Who the game is for: the gender skew

Hostility is rarely shared out evenly. The most consequential test of any theory of motivation is who its rewards actually reach. If contribution rides on belonging, a sense of competence, recognition, and a tolerable environment, then a community that supplies those unevenly will end up with a skewed set of contributors.

Wikipedia and Stack Overflow both do, and the skew runs along one line in particular: gender.

The headline figure for Wikipedia, drawn from a 2008 survey by the Wikimedia Foundation and UNU-MERIT, was that fewer than thirteen percent of contributors were women.

Correcting for bias, Hill and Shaw estimated that women made up about sixteen percent of all editors and roughly twenty-three percent of adult editors in the United States. Stack Overflow’s is starker: earlier quantitative work had already flagged the imbalance, and by the site’s own developer surveys women were about 5.8 percent of contributors.

The tempting explanation, that women are simply less drawn to or worse less capable of this kind of work, does not survive contact with the evidence, which points instead at environment and treatment. Shyong Lam and colleagues examined more than a hundred and ten thousand editors and gave their paper the pointed title “WP:Clubhouse,” after Margolis and Fisher’s study of women in computing. Only about sixteen percent of the editors who joined in 2009 identified as women, and they made roughly nine percent of that cohort’s edits.

Lam’s team found that the good-faith edits of female newcomers were reverted more often than men’s, that women were more likely to be blocked indefinitely, and that women left the project sooner.

They were careful about a point that gets flattened in most summaries: a revert discouraged women and men about equally, so the difference lay in how much more often women ran into one.

Coverage of subjects of particular interest to women lagged behind the rest, a content gap that follows straight from the contributor gap.

Stack Overflow’s barriers tell a similar story. Denae Ford and colleagues interviewed twenty-two women across the full range of the site, from people who had never posted to a user ranked in the top hundred of all time, then surveyed nearly fifteen hundred developers to separate gender-specific obstacles from general ones.

Five barriers came back rated significantly higher by women, and the most telling land squarely on the needs that sustain motivation: doubt about whether their expertise was good enough to be worth posting, which is the competence need turned into self-doubt; the feeling of being overwhelmed by competition against a vast crowd of users, which is the public scoreboard experienced as intimidation rather than invitation; and plain unfamiliarity with how the site’s features worked.

That Ford could interview a top-ranked woman at all settles the question of capability. The barrier sits at entry and belonging.

Set these findings beside self-determination theory and the gender gap becomes the clearest case of a community withholding the conditions that sustain its own contributors.

A revert on Wikipedia and a downvote on Stack Overflow are the same gesture, the recognition system delivering rejection, and the theory predicts that such signals bite hardest on the people with the least sense of belonging to fall back on. The competitive, public character of a reputation scoreboard only sharpens the bite. The motives are the same across genders; what differs is the community’s willingness to supply and protect them.

A gap produced by design can also be narrowed by design. When Jonathan Morgan and colleagues built the Wikipedia Teahouse, a deliberately friendly space where newcomers could ask questions without getting bitten, the newcomers invited into it stayed at higher rates. Rebuild belonging and more people remain. The mechanism that drives contributors away can be run in reverse.

What the work actually pays

So, why would anyone do this for free? Because it was never free in the sense the question assumes.

These projects pay in a currency money cannot easily buy and would often ruin: the absorption of work that is interesting in itself, the satisfaction of growing skilled, the recognition of peers who understand what you did, the pull of reciprocity inside a community that gives back, the meaning of adding to something that will outlast you, and the identity of belonging to it.

The missing paycheck does work of its own, holding the activity in the part of human life where those rewards exist at all.

The research carries a practical lesson for anyone hoping to build or steward this kind of work. You cannot simply buy commons-based contribution, and the attempt tends to chase off the motives you were counting on.

What you can do is guard the conditions: keep the work meaningful and the tasks self-chosen, make contributions visible and credit real, let reciprocity and reputation accumulate, and treat the people who arrive wanting to help as the scarce and fragile resource they are.

Get this wrong and you lose contributors, and with them the breadth of a record that ought to belong to everyone. The wonder that strangers cooperate at scale with no one compelling them is real. But it behaves like a fire: it goes out when the people tending it forget what fed it.