I disagree. First is the immense capital investment these companies have in physical servers and data centers. They have economies of scale in delivering conten

I disagree. First is the immense capital investment these companies have in physical servers and data centers. They have economies of scale in delivering content over the internet. Second is mindshare and data lock-in. Users log onto Facebook because other users are there. There are no examples at that scale of user divestment from a platform (in lieu of a major technological or social blunder, ala MySpace or Friendster). Just being 'better' than Facebook means diddly squat. I think it is still theoretically possible to be a 'better' search engine than Google, but they have plenty of other moats and momentum to stave that off. Don't kid yourself, these are certainly monopolies .