"It isn't Zuck's fault nobody else is as competitive as Facebook is.... I look at you MySpace and Twitter." Social Networks have natural Monopolies. Not that

"It isn't Zuck's fault nobody else is as competitive as Facebook is.... I look at you MySpace and Twitter." Social Networks have natural Monopolies. Not that I believe FB is necessarily a monopoly in the economic sense, but it's not quite right to talk about 'competition' in systems that are designed to have one winner. If there were 5 Twitters for example, one of them would eventually dominate, one way or another.