Or ISPs with a penchant for expansion can produce Spotify competitors (many mobile carriers already do have their own streaming music services) and favor those

Or ISPs with a penchant for expansion can produce Spotify competitors (many mobile carriers already do have their own streaming music services) and favor those over competing services as included/complementary/whathaveyou services. It's not a particularly ridiculous end to walk out to, really. Once they have their service they don't need to do any favors for other music competitors, such as Bandcamp, unless those services "partner to provide a premium experience." In this fuzzy future, they need not block it, just make that traffic part of the basic pipeline that gets regularly and frustratingly throttled.