What do you mean by "distributed thousands of terabytes of Spotify to iOS users for free"?
Apple has distributed over 300M downloads of Spotify to iOS users, since Spotify is a free app it hasn’t paid a cent for over 30 Petabytes of bandwidth costs.
I imagine that for an iOS store there is more.
Let's not act like its philanthropy.
Yes they do, publishing on the App Store isn't free. Also, they favor some apps they don't compete with, (Uber), while handicapping others, (Spotify). Hardly fair.
You have to pay every year to be in the appstore.