I pay for it because it's dirt cheap and you get track ratings. If I discover an artist I use RYM to get the best 3 songs of their best 3 albums on YouTube. if I still like the band after that I'll buy the highest rated album.
I used it for like 5 minutes before paying for it, it's obviously great, and the "pro" upgrade has the funniest best feature ever (exclude ratings by the age of the rater).
