Like when Apple offered to allow third-party payment processors but would only reduce its cut from 30% to 27%.
So Apple has two big problems now:
1. It's going to have to justify that 30% and it can't; and
2. It will come out that for certain companies, Apple charges significantly less than 30%. By picking favorites, particularly in markets Apple itself competes in, it's going to be a problem.
I suspect we will end up with Apple (and Google):
1. Being allowed to charge 10%;
2. Allowing third-payment payment processors;
3. In-app purchses through third-party mpayment processors yielding 0% for Apple. Think Amazon digital purchases like Kindle books and movies or Netflix subscriptions;
4. Purchase of apps charging less but I honestly don't think this matters because apps have largely moved away from upfront purchases in favor in in-app purchases and I see this trend continuing.
The big question is: will Apple have to allow third-party app stores? That's really what Apple wants to avoid.