What does it matter? A large percentage doesn't mean more than 50%, or more than competing services. And remember that those are just systems, not single companies.

Frankly, if something I made had reached even 5% of the whole human population, I'd consider that freaking huge! Hell, I can't even imagine what it's like to have that much influence.

Don't get me wrong: I dislike FB too, I don't use it, and I lobby against it when it comes up. But it is, unfortunately, rather big.