How could that possibly get past EU antitrust regulators?
My Spotify subscription, for example, was purchased on their website, which I got to via a browser on my desktop computer. Apple has had no involvement whatsoever in my relationship with Spotify other than as a provider of some of the platforms on which I run Spotify's apps to use my Spotify service.
If Apple were to tell Spotify that Spotify must provide a way to cancel my totally outside of Apple Spotify subscription from Apple's subscription managements interface as a condition of being allowed on the App store I can't see the EU allowing that.
I can see that as a requirement allowed to maintain customer security. And Spotify is already obligated by european law to allow easy cancling.
If apple requires them to use an api to pass "basic techincal compliance" (they could just use a callback and let the app handle the rest) that would be very much in the spirit and the letter of the law.
My Spotify subscription, for example, was purchased on their website, which I got to via a browser on my desktop computer. Apple has had no involvement whatsoever in my relationship with Spotify other than as a provider of some of the platforms on which I run Spotify's apps to use my Spotify service.
If Apple were to tell Spotify that Spotify must provide a way to cancel my totally outside of Apple Spotify subscription from Apple's subscription managements interface as a condition of being allowed on the App store I can't see the EU allowing that.