Except they kicked fortnight off the store, so they are now getting 0%. And since Fortnight is free to buy, Apple would also get $0 if forced to allow non-IAP purchases.

Weren't they already getting 0% since Epic snuck IAP outside of Apple's system into their app to bypass Apple's requirements? So Apple had no choice but to ban them. You're implying that by not kicking fortnight off the store, they'd still be getting 30%

'would' not 'will'. Since they banned the loot box, Apple cares so much they actually 'are' giving up that 30%.

Loot boxes became illegal, as they were determined to be a form of online gambling. It wasn't a stance that Apple took to protect their customer, it was a federally mandated action handed down from the courts.