[6stringmerc]

Good question. Going to take a couple guesses: Probably lock Soundcloud tracks into the Spotify platform? Or have a larger pool for advertising clout?

[mdaniel]

Isn't some of the draw of SC that the artists know they'll reach an audience? I am not a Spotify subscriber, but I wouldn't think to go to them or Pandora for any unsigned artist - I immediately go to SC.