[ahpearce]

I think in that case, people need to pony up something of value to contribute and participate in such an environment. There are a few cases where I think this has succeed, in communities like ChangeMyView on reddit... Paid communities are kind of already starting to take off. I wonder if you could couple a subscription model and a minimum word count, with heavy moderation (of the right kind)... It'd be hard to pull of.