The fight over alternative payment methods is fraught with misunderstandings. Apple has always stated their intention to collect the 30% regardless of what payment method you use, because as far as they're concerned it's not a payment processing fee. They view it as a platform fee that you pay for access to iOS, the App Store, and other services, and so far regulators and governments have agreed with them on that.

What's changed here is that Apple has now set a number to the "payment processing" portion of their fee. This gives them a way to cave on alternative payments while still retaining the bulk of their profits.