Missed this Patreon blog post from last month on accounting for Apple’s 30% cut:
Apple is requiring us to start using their in-app payment system in order for Patreon to remain available in the App Store, which means purchases made from our iOS app will be subject to Apple’s 30% App Store fee.
The default setting will be that users on iOS will have to pay more than on the web to cover this fee. And last week we had the Hey Calendar rejection. Strange that Apple is tightening the screws with the EU’s Digital Markers Act waiting in the wings.