We did do this, but for twitter. Fighting fraud with a social graph is awesome. We planned on doing it with Facebook too, but never made it urgent. We probably

We did do this, but for twitter. Fighting fraud with a social graph is awesome. We planned on doing it with Facebook too, but never made it urgent. We probably should have focused more on commerce instead of P2P and non-profits, and gone for wherever the transactions were. We expected the twitter platform to grow with the usage, but I still haven't seen that. There are very few companies that build on top of twitter that ask you for money.