As far as a moral compass goes, I wouldn't give any money to SoundCloud. Much like YouTube, anyone can create an account and upload music. Obviously if you upload popular copyrighted music, it will likely get taken down quickly. But the less popular it is, the more likely it'll go under the radar if someone uploads music that isn't theirs. If you don't pay for premium, then that music will have ads playing between tracks. The creator of the music won't see any money from it, I doubt the uploader would either. As it currently stands, SoundCloud profits from stolen music. Personally I feel better pirating music than I would paying for a SoundCloud premium. I honestly don't understand how GrooveShark got shut down back in the day, yet SoundCloud got to keep running. They are damn near the same exact service.