Here’s the thing. Apple is paying for the servers that process the in-app payment, the credit card processing, handling all the charge disputes and chargebacks/fraud requests from the credit card company, etc.
That’s not a $0 Bill for Apple. Credit card chargebacks cost businesses a significant amount of money, as well as employing the iTunes App Store support agents, data center infrastructure, they designed and built Xcode, add new features to iOS that enable new features in the apps, handle push notifications, etc.
And the yearly developer fee of $99 in no way covers all of that. So they have to take a cut somewhere.
What if there was a way to relief Apple from the hard work of having to process all those payment fees.
Apps that are completely free get Xcode, curation, and the iOS platform at no extra cost. Whether it’s a free game from a small developer or say, the Amazon Kindle/Music/Alexa/Shopping app...