RateSpace is only for users of MySpace. This is used to determine your myspace rating. The rating is based on when each person signed up for Myspace. Myspace has millions of users and this will tell you where you rate amongst the millions. The longer you have been a member, the better your rating. So why would anyone want to rate their myspace profile? Of course, to prove they aren't a newbie. :)

Adding it on your profile is as easy as adding an image to your profile. Directions and an example can be found on this page.