Plenty of apps themselves do what you seem to be classifying as none of their business to intervene in. Doordash or other delivery apps tell restaurants they c

Plenty of apps themselves do what you seem to be classifying as none of their business to intervene in. Doordash or other delivery apps tell restaurants they can't hint to their customers to order outside of the app. In fact they monitor communications with restaurants to ensure it's not happening, which is pretty gross. Uber/Lyft don't allow drivers to see who's asking for a ride and then ask the customer to pay outside of the app. If you're an eBook platform app, are you going to allow authors to hawk their books with a first teaser sentence "feel free to buy this eBook from my personal site instead of on this app"? I wouldn't say Apple is "inserting itself" into a transaction where it has no business. The app developer agreed that in offering the app, Apple's terms would be agreed to, and those include not offering or suggesting methods to circumvent the financial transaction that the app is directly relevant to.