I did recently bin my Spotify subscription owing to privacy concerns but have returned - it's a pain to build up a library and then put it somewhere accessible (sometimes offline in an era of devices that aren't as big as the iPod I used to have) and I was optimistic to think that the value-add would be trivially replicatable. The weekly playlists are excellent too, so currently I'm prepared to pay a monthly convenience fee. If that changed too dramatically, I'd probably move back to piracy.
Netflix is a good example of faltering here where Spotify succeeded - I know 99% of the time that the media I want to watch isn't available on their platform whereas that's an almost non-event with the latter. Convenience is something people will almost always pay for.