Alexis Madrigal at The Atlantic:
So, if tripling the size of the social network to 3,000,000,000 users is not going to be enough to justify its valuation with its current revenue per user, there is only one strategic direction for Facebook to go. It needs to generate more revenue per user. A lot more.
This is one of the problems with being so big that the world’s population is limiting your growth in a market that demands ever-increasing growth.
(Via Jim Ray.)