I'm surprised as to why Facebook isn't looking in other sources of income instead of ads. Like e-commerce for example. Providing a platform for the gazillions of small to medium companies that already have an account would be IMHO a more wise decision. Or build an analytics platform and combine it with real time demographics and blow the competition away. I'm sure there are dozens of ideas as to what they could build and still we don't see anything innovating.

But then again perhaps their problem is intense scaling. With 800M users even the simplest idea becomes cumbersome in developing.