I just searched the App Store for Patreon:
The top hit was an ad for Ashley Madison. Seriously.
The second hit was the Patreon app.
The third hit was ChatGPT for some reason.
But if the Patreon app was not in the App Store, no doubt there would be a bunch of scammers trying to pose as the official Patreon app.
I'm not at all aware of where the boundary is between "that's fine" and "that's abuse of market dominance to fund uneconomical expansion".
Does anywhere have a specific "national defence" tax and another "police fund" tax etc. for each expense, rather than "income tax" and "sales tax" for each source?
There doesn't seem to be anything snowflake special the Patreon iOS app needs to do that a web app cannot handle.
People get confused very easily when small digital subscriptions are charged through third parties on behalf of sellers whose name is often different from the app or service.
I'm not sure a shop app fixes that though. Better communication and better choice of names seems far more important.
Apple doesn’t let web apps do everything that native apps can do. Their App Store is the only way people get apps on their device and if a search for ‘patreon’ in the App Store returns nothing, that’s a lot of confused or angry people that are going to wonder what their monthly bill is for. Maybe some very low double digit percentage of these people will try to load a pwa from patreon.com