..., which raise questions about the ambiguity of Wikipedia's authority and the virtual cycle that keeps the site going; The second concerns the need to alter its practices as it gains in popularity, raising questions about what any wiki site, profit-oriented or open source, must do to scale to large numbers...

...Shane Greenstein; Rebecca Frazzano; Evan Meagher In 2009 Wikia was the Internet's largest for-profit provider of hosted open-source wikis, with over a million daily users. After five years of existence, the organization had supported a wide range of exploratory activities, experiencing both success...