Well, actually, the answer to this is much simpler than you might first expect. Any of you who frequent the pages of Myspace.com know that every day they seem to be getting more and more "sketch" - the advertisements, the random friend requests from businesses looking to make a few bucks. Here's what's happening: Myspace is going "commercial." Myspace is out to make money, and companies advertise on Myspace because it generates more money.
Now I'm not saying that other sites (like Facebook) aren't making money (they are), but it's more about the way the whole system is set up right now. Atleast for the time being, you have to be, or have been, a student to get an account. And, only companies hand-picked by Facebook can do marketing to its members. Also, it's difficult to "randomly" add friends, which makes it "safer," in the sense that you'll most likely know the requester. Finally, you can't see people's profiles unless you're friends with them!
Bottom line, though it's difficult to say, and difficult to swallow, Myspace.com will eventually lose out to Facebook.com - that is, if Myspace continues commercializing and Facebook is careful to guard their network. O.K. So what does this all mean for you and me? If you're a student, get on Facebook and add me as a friend! Here's a link to my page: http://www.facebook.com/p/Jay_Mathes/48609039