Spotify revenues

http://www.smh.com.au/business/media-and-marketing/spotify-looks-to-increase-advertising-revenue-streams-20151013-gk84yj.html

http://musically.com/2015/10/20/james-blunt-spotify-royalties/

http://thetrichordist.com/2015/10/20/spotify-has-apparently-failed-to-license-account-and-pay-on-more-than-150-cracker-and-camper-van-beethoven-songs/