StackOverflow
Co-founder of Stack Overflow, here.A lot of the people who were involved in some way in Experts-Exchange don't understand Stack Overflow.The basic value flow of EE is that "experts" provide valuable "answers" for novices with questions. In that equation there's one person asking a question and one person writing an answer.Stack Overflow recognizes that for every person who asks a question, 100 - 10,000 people will type that same question into Google and find an answer that has already been written. In our equation, we are a community of people writing answers that will be read by hundreds or thousands of people. Ours is a project more like wikipedia -- collaboratively creating a resource for the Internet  at large.Because that resource is provided by the community, it belongs to the community. That's why our data is freely available and licensed under creative commons. We did this specifically because of the negative experience we had with EE taking a community-generated resource and deciding to slap a paywall around it.The attitude of many EE contributors, like Greg Young who calculates that he "worked" for half a year for free, is not shared by the 60,000 people who write answers on SO every month. When you talk to them you realize that on Stack Overflow, answering questions is about learning. It's about creating a permanent artifact to make the Internet better. It's about helping someone solve a problem in five minutes that would have taken them hours to solve on their own. It's not about working for free.As soon as EE introduced the concept of money they forced everybody to think of their work on EE as just that -- work.