I think, and I hope there is going to be a room for compromise there.
If they'll manage to tune their recommendation and discovery system in the right direction, they will be an appealing platform for both indies and majors.
Indies can finally get a prime time exposure within the major content. If you sound like taylor swift, and your lyrics are about breaking up with every possible person on earth, I think you should deserve a spot in an automatic generated 'San Valentine's day Single' along with her.
Majors can have a far better social layer that as it is today no one else has been able to create (Apple Ping anyone?). Soundcloud can offer that millennial generation engagement in a pure music context that so far has been lacking everywhere else.
And Majors love millennials :)
I'm not saying it's an easy position to be in, and also, I wasn't myself that faithful about all this would have played out for SoundCloud, but to be honest, is an exciting time for the music industry.