But Spotify can’t even tell users how to upgrade to premium according to Apple’s rules. The best they can say is “You can’t upgrade to Premium in the app. We know, it’s not ideal.”
I honestly cannot see the legal footing in this whole thing to claim that Apple has any sort of obligation to be "fair" here.
Or even just any legal depth. It's all just PR fluff speak.
Personally, I use Amazon Music because I get it as part of Amazon Prime. It has most of the music I want to listen to, but not all. I was considering Spotify, but with nonsense like this, this is one potential customer that they have lost.