If i'm not mistaken the people behind Spotify were also some of the people behind The Pirate Bay, so they may have had some seriously good insights on how to treat your customers.
To clarify I'm not suggesting owners of what.cd started spotify just some elite members. I happened to join what.cd before Spotify came out and the tracker was shut down. Initially spotify overlapped with what.cds comprehensive library of rare high quality audio significantly and as they moved out of grey market, over the first year or so, some were removed after complaints or contracts were signed with artists. Then what.cd servers were seized for copyright infingement and other trackers tried to replace it. To download that much data from their platform you'd need to have shared a significant amount yourself for years. They probably used pirate bay and other less comprehensive libraries as well, but the high quality lossless audio that you paid for was likely from what.cd. This was discussed on those tracker forums and irc during that time.
