I think there's plenty of opportunity for exponential growth in Revenue. When we start measuring that in users, I think something is broken.
They certainly can't expand the user pool by that much, which means that they need to find a way to monetize their existing users more effectively. I think that Facebook can certainly make more/user than they currently are. $5, maybe $10/user is possible. But $100? I don't think so.
So then are advertisers willing to increase their FB advertising budgets exponentially? Does FB have something coming down the pike on a regular basis to make that happen?
http://venturebeat.com/2009/03/19/the-worlds-most-lucrative-...
That doesn't sound to me like a "proven revenue model" to support a $104B company with exponential growth.