I think you would care about making money more than the size of the platform. There was a time when MySpace had 2x more users than Facebook, but app developers

I think you would care about making money more than the size of the platform. There was a time when MySpace had 2x more users than Facebook, but app developers on MySpace didn't have the same level of virility that Facebook apps had and thus it was far more lucrative to make FB apps.