Maybe costing 30% more isn't worth centralizing the subscriptions
But so I was curious, I have $762 worth of subscriptions a year through Apple. So I could save $228.60 if they were all 30% less.
To me that is worth it. But I would also like to point out, that many of the apps I am subscribed too. I am only subscribed too because it was easy through Apple and I knew that I could cancel. I have a number of expired ones that I used for 6 months or a year but I didn't need anymore. A few that I have right now fit this but I am still actively using them.
If it wasn't for this central subscription, they would have never gotten my money to begin with.
Disney+, Budget app, weight management, couple yearly apps. Not that hard to get to that point I don't think.
Neither company is going to say “oh, you’re using another payment processor? Ok, our cut is now 0.”
Much more likely the argument will be “oh, you’re using another payment processor? That’s fine, industry standard payment processing fee is 3 percent, our cut will be correspondingly 27%”
IMO the main problem is the lack of competition. If Apple were forced to accept other payment platforms, you'd soon find the same service for cheaper.
But the only reason that this works the way it does, is because a developer has to use it. If there really was a third party offering that was just as easy to use sure, why not. But I just don't see companies willingly making it easy to cancel a service without trying to send the customer through some retention workflow.