Ask Dalton Caldwell: why not a wikipedia-like business model for app.net?

Asked with a general and open sense: why the wikipedia's business model is an isolated case (is it?), why don't 'we' democratized it for product which content is mostly made by the users like twitter (and facebook)? It might do the job: hackers could have great APIs, big startups could become huge sponsors, casual users would not have to pay, and of course, there could be no ads. You may say "because wikipedia is a foundation". But companies can do that too no? The HumbleBundle team do something very similar already...