If someone is interested in a $15/mo plan, they are unlikely to pay a 150% premium for the "convenience" of music streaming, if they already have a phone with gigabytes of storage for high-quality lossless audio.

Those seeking non-neutral internet (e.g. zero-rating traffic from a handful of specific commercial partners, which pushes the internet towards a cable TV model, rather than an open web) have several choices.

https://www.eff.org/deeplinks/2016/02/zero-rating-what-it-is...),