You want to make sure artists are paid a fair amount for how much you listen to them? Use last.fm or another service to record what artists you listen to and how much, and cut a check to them directly for 1 cent, 10 cents, or whatever you think is fair on a per-song basis every 6 months. Whether you listen to music on Spotify, Google Music, or you torrent all your music, this is a more personal way to show the artists you listen to how much you appreciate them, and it circumvents the RIAA and all the other terrible things in between you and the artist.