Spotify is truly fucked if Apple is going to pay during the free trial AND pay higher overall royalties. When the negotiations come up again with Spotify, who is already running increasing losses, things will just get worse.
While Apple has a lot of things going for it, SaaS hasn't ever been their strong suit. Spotify's entire business is streaming music. Apple's streaming music service is a small fraction.
Regardless, now Spotify is in the crappy situation of Apple having some top albums they don't have, and Apple offering it for free (to subscribers).
You really don't want to get into a $$$ fight with Apple.