T-Mobile customers will be much more likely to stay with the established brand (e.g. Spotify) because they get free data for it, whereas an indie-Spotify, because it is smaller and doesn't have the awareness, doesn't have a deal with T-Mobile, and thus customers will be less inclined to choose such an alternative.
That's a marketing problem for indie-Spotify, not a net neutrality problem.
When Google's Chromecast offered 3 free months of Netflix with a purchase was that an attack on net neutrality issue too since it didn't drive equal sign up opportunities to Hulu?
They get to my phone the same way the music does... from a cell tower. I don't really care how the carrier got them to the tower. Bits are bits, right?
