I definitely don't think the current people running it are trying to be the next Zuckerberg. But you do have to have people working full time and pay for server costs, electricity, etc. A distributed system would be interesting, but is that what they are doing? At this point is it purely developers volunteering their time and money (along with donations)? I can't see donations supporting this type of thing at a larger scale.

I'm just wondering how they are getting the capital to scale.