.... instead of paying 30% to Apple you get to do all the coding, deal with any payment issues, and have to provide for auditing as well ...... and all that saves you 4%?!?
Doesn't that mean that Apple are saying that their contribution for doing all of those things is 4%?
So isn't this Apple admitting that they should only be charging 4% for payments that go through them?
Is it possible that SK might come to the same conclusion and tell Apple that they have to lower their cut on payments to 4% instead?