F/B will have to charge to pay their investors, back when they started "free" was what helped it catch on. But now its where they want it, have lots of crisis junkies addicted and they'll pay to feed their addiction. Remember when the internet started out and everything was free?
Just hope that Google stays ahead of the game and stays free. They figured out how to get nice, big buildings and a big company by staying free to the user which was the original intent of internet. Please, Google don't get greedy!