You can opt-out though. Just don't sell digital goods on your app and don't use your app as a funnel to direct people to your website where you sell them. Audible takes this approach and it seems to work fine enough for them. Boom! Apple will take 0% of your revenue.
That's a useful workaround when Apple allows it, which they haven't done consistently.
But that's not at all what I meant by opting out. I meant "If this is the price for 'exposure', just stop giving me 'exposure' and let me sell digital goods in my app."
Also it's not just 'digital goods', it applies to services too. You can currently manage a netflix subscription in the app, I think, but it's been unavailable a lot and netflix seems to have a special exception that doesn't apply to video services in general.
Audible and Netflix have exceptions given they are “reader” apps. For something like Roblox, they must have in app payments if they accept payment via the web, so the publisher would have to opt out of the platform completely to avoid the 30% surcharge for one of these types of apps.
