Firstly, Bill Gates is being a philanthropist with the billions he earned by running a lot of other entrepreneurs to the ground. But if he's had a change of heart, then I applaud him, even though it doesn't absolve him of what he did in the past.

Secondly, I'm under no illusions about FB's motives, but if this can bring educational resources such as Khan Academy to more people in developing countries, I'm for it. The worst thing you can do to developing nations is to give them handouts (see: Africa). There will be no permanent progress without education.