There isn't a lot of privacy to begin with on Facebook. So if companies are able to track our information from Facebook, will they be able to track our email and look through each thing we send and receive. Facebook will have all of our information at it's grip. Plus people are usually heavily annoyed with how facebook works half the time anyways so that may stop them from switching over.

... so did he just like kill all the dementors in the world with that spell??

I think APB had a pretty decent idea but had a terrible follow up. The game was really innovative with the whole design "anything" idea and allowed for some really cool and creative things, but it didn't have an intensive to keep paying and keep playing. Like most MMO's that require a fee (or even ones that are free-to-play) they have new content released, hundreds of different items, classes, spells, etc... But APB didn't really have anything to keep the player constantly playing. The gameplay was super repetitive and there was a limited amount of gear a person could get. Also there weren't many upgrades or new items to get to improve your character. They needed to have these elements that would want you to constantly improve your character with gear or skills. I mean no one is going to want to pay to play an online version of GTA.