> If consumers were sufficiently upset at the increased cost of apps on the Apple Store, wouldn't they change platforms?

Consumers are not aware of this problem. Apple doesn't allow apps to inform users about the 30% tax.

https://www.theverge.com/2020/8/28/21405140/apple-rejects-fa...

"Apple blocked Facebook from informing users that Apple would collect 30 percent of in-app purchases made through a planned new feature, Facebook tells Reuters. Apple said the update violated an App Store rule that doesn’t let developers show “irrelevant” information to users."