While it's probably not 10%, the transaction cost will come out of the transaction when processed by Epic. Normally that comes out of the 30% that Apple takes.

While it's probably not 10%, the transaction cost will come out of the transaction when processed by Epic. Normally that comes out of the 30% that Apple takes. Either way, the purchaser is saving $2 and the developer gets a larger share; this doesn't seem like a bad thing, especially when the developer is going to be spending a decent amount of cash fighting the App Store monopoly.