The scoop on MusicMP3MusicMP3 is not the greatest site we've seen. The site is just a mirror of another site, Golden MP3 and they are both as bad as each other. The registration page of Music MP3 takes you to Golden MP3. Their site says:
'While MusicMP3.ru is experiencing some technical problems with accepting credit card payments you might sign up here, on its partner-site GoldenMp3.ru with equally broad and diverse music collection, and replenish your account balance.
We would be cautious about giving these guys your payment details even when they are back up and running. There are other sites that are safer, cheaper, have more songs are most importantly, more freebies!