Apple does not seem to like to do big purchases. Even though they probably could. Spotify is not (yet) profitable so they would probably have to hike up the prices. At this point they are probably better off doing their deals on their own and slowly catch up.
I should probably try Spotify as so many people say it is better than Apple Music (which I do genuinely like). Spotify currently offers 3 months premium subscription for 1€ so it may be worth a shot.