Spotify responded that these figures were way out (without giving the true numbers). If I remember correctly, the low figure was for a short period & related only to the Swedish market AND for only the Swedish co-writer's royalty - i.e. it was half of the Swedish royalties for a few months, not the full worldwide royalties for a calender year. Here's one report:

http://www.telegraph.co.uk/technology/7590782/Spotify-reject...