1% rule - Wikipedia
90/9/1 rule: 90 percent of users consume, 9 percent remix and distribute, and just 1 percent actually create
Everything Is Television
The 1:10:89 Rule - For every given 100 people, 1 will actually create something, 10 will vote on what he created and the remaining 89% will merely consume.
Jeff Howe • Crowdsourcing: Why the Power of the Crowd Is Driving the Future of Business
Whether you believe in the 1/9/90 rule of social networks or not,