Problem is that the useful societal networks as described by e.g. the other comment below [0] are naturally scarce resources. A fraternity (and the associated

Problem is that the useful societal networks as described by e.g. the other comment below [0] are naturally scarce resources. A fraternity (and the associated wider friends-of-friends social network) that consists of dozens or even hundreds of people doing favors to each other over the non-frat people, that's still manageable and self-sustainable. However, the world has billions of people. A network of million already is useless, and would leave the market open for another exclusive social club. [0] https://news.ycombinator.com/item?id=15316723 https://news.ycombinator.com/item?id=15316723