Interesting the comments here, rather than addressing the issue of "is it okay for Apple to force implementation of their own services in addition to others" the discussion is more "well, nobody's _forcing_ you to do this".

When does it stop then? If Spotify releases their app to the store, do they have to include Apple music functionality in their app? If I have an app with a "listen to this on spotify" button, do I also have to have a "listen to this on Apple music" button?

See no evil, I guess.