BLANK: In the last bubble there were no customers. Facebook makes $4 per user. The users are customers. They produce real revenue. Nobody's debating whether Facebook can make money. They're debating how much more valuable Facebook's hundreds of millions of users can be, and how fast can they can grow that value. That's an execution problem."
Facebook makes $4 per user from advertisers who LOSE money when they pay Facebook. In other words, Facebook's users LOVE their product. Facebook's customers (advertisers) get nothing from it. Click through rates suck, and actual ROI is negative. Eventually, the new advertisers who show up and realize it's a waste of money will stop paying for nothing, and then the $4/user goes away. Users and the media LOVED Groupon. The businesses who were Groupon's actual customers HATED it. This is no different. Don't get me wrong, a billion users is incredibly monetizable. Just not the way Facebook is trying to do it. The social B.S. will eventually fade to the real stuff.