I joined the other one (My Space???) for a particular reason to get my art "out there" but I just could not get interested in it.
I think I am just a boring old fart :p.
I think it is so they can say to their friends "I have 500 friends". It is like a contest to see who can have the most friends, or who can pee up the wall the highest :D.
I don't even KNOW 500 people.