I think the point was that there basically is no fully technical solution. Regulation has to come from the society in question.
Granted, I'm holding out hope that someone surprises us with a technical solution. I just don't have high hopes there.
It’s not about about being cool or making a hip new website. The point is that people won’t choose to pay for services when free ones exist. It requires a monetary obligation in the form of taxes. Countries don’t function because everyone decides they’d like to pay for the infrastructure that benefits everyone. They function because that money is collected in the form of taxes.
Your tiny cool self-regulating community, will either die, be eaten by Facebook or become Facebook.