I don’t know if Apple Music has to pay 30% to Apple, but either way It wouldn’t change my opinion and I don’t think it would make a difference to the EU. It’s illegal in most places to use your dominance in one market to your advantage in another. Google got fined by the EU for doing that with Android and Chrome/other GApps. I personally think Apple should allow developers to link to an external payment system for subscriptions/iAPs if they would rather set all that up themselves, but we’ll have to wait and see what the EU decides.