> I wonder if regulators will just decide the split up facebook.

I keep hearing this suggestion and it makes no sense. Split into what? It would be like asking to split Google into one company doing the search and another one doing the ads. You're talking about loss leader strategy here and you cannot have a company whose only product is a loss leader. Majority of users won't pay to have search or social network. They value their privacy much lower and would trade it to get the services without direct monetary compensation.