Comment by frizzlebox

Adding to this, the T-Mobile FAQ claims they're willing to add legal services if you contact them:

http://www.t-mobile.com/offer/free-music-streaming.html

  Will you add more streaming providers over time?
  
  Absolutely!  Any lawful and licensed streaming music service can work with us for inclusion in this offer, which is designed to benefit all of our Simple Choice customers.  And we want to hear from you!  Who do you think we should add next?  Vote at #MusicFreedom and be heard!
   
  If you are a streaming service provider Click here, send us an email and we’ll get back to you to begin the process.

Doesn't make it any less anti-competitive, I think, but it feels nice to see this kind of promise.