This makes more sense to me. At first I didn't get it because Facebook already dominates mobile photos. I would guess Facebook's mobile apps do considerably mor

This makes more sense to me. At first I didn't get it because Facebook already dominates mobile photos. I would guess Facebook's mobile apps do considerably more photo sharing than Instagram did. If you add a photo network on to twitter though, it becomes a lot more of a facebook competitor and I can see people giving up on Facebook and moving their main social networking to Twitter. I can see that being scary to Facebook.