It was in a footnote in the ruling which is only starting to get attention.
Apparently the 30% rule in a different contract than the one that requires IAP. So it still stands.
So… you can’t use your own system, and if you link to a website instead, Apple can knock at the door each month and grab what you would have paid. Shallow victory there.
Found the footnote on page 155:
621 - The Court also notes that in the but-for world where developers could use an alternative processor, Apple would still be contractually entitled to its commission on any purchase made within apps distributed on the App Store.
