This is called the "normal profit" and, yes, there will be a set of businesses that earn the normal profit. What people are discovering is that the "normal profit" for a music business is not "oh-mi-god-Facebook-is-a-natural-monopoly!"-sized, but rather "oh-mi-god-the-content-owners-have-all-of-the-negotiating-power"-sized.

Ironically, this gets re-discovered about every 5 years...