With 9.99 you also get YouTube Red and the selection for play music seems to be huge when compared with Amazon Prime Music (At least enough for me). If I don't have a song in play, I can use YouTube app and it plays in background. This is important for regional songs as Spotify does not have a huge library for non English songs but YouTube has almost everything. I agree that the quality is not that great with YouTube, but that's something is not of a big deal for me. Does anyone feel like this?
What's your metrics to decide between Play, Apple and Spotify?