“…One consequence is that over time, the amount of effort needed to add new content increases, since new edits are more likely to be rejected, making the work less rewarding [33,1]. This may also explain, for a part, the contributor turnover [11,22]: once a project is finished, or at least mature, some people, those interested in content addition, drop. As a consequence, there is a constant need for these projects to recruit new contributors, and to turn them into 'big' contributors, to guarantee the survival of the project in the long run.…”