Cricket and it’s “Muve” music service is not discussed much, but they are neck and neck with Spotify for number of US subscribers. Only Rhapsody definitely exceeds it in # of US subscribers. (Roughly 1 million according to this article.)
In any case, it looks like a bargain way to get cell plus music as a service. A bit too “bargain-y” for me, but if you’re on a budget it may be a good way to go.