#5SiriusXM21% #6Apple Music19% #7iHeartRadio15% #8SoundCloud10% #9Audacity6% #10TTuneIn5% #10TDeezer5% #10TNapster5% #10TTidal5% Two companies are in the running for second place:SpotifyandAmazon Music. Spotify leads in one important metric: number of paid users. Meanwhile, Amazon Mu...