Software is 100% margins. How is it despicable that the party that originates the sale gets a share of the proceeds? Apple doesn’t get anything if Microsoft originates the sale on their own properties and the user simply enters their username and password. Getting paid for enabling the sale of goods and services is a completely normal thing in all aspects of business.
What about Microsoft Outlook then? Microsoft charges for Exchange and Outlook is interface to Exchange to consume AND create content.
Any way, I look at this, its inconsistent applied rules by Apple.