i like myspace alot (i typed a 3 and backspace 10 times before i hit an e there, just to let you guys know) really the only reason i like it is cuz of the css practise, i was never good with it until i played with it there.
But for community, i like facebook, cuz its based on the schools and whatnot, higher caliber of people, ones you actually want to catch back up with there lol
Also. To Answer your question (Rather than give more speculation)
In the past two weeks, number of registered users has shot up from 80 million to 102, with no upgrade to their hosting plan. they have the same bandwidth for 80 million people they have for 102. Not to mention they are running out of storage. I forget the numbers, but its not too important, you have your answer, night everyone