This is not the epic case, but now couldn’t epic direct users of fortnite to add credits to their account on epic’s website and bypass the apple tax, which is part of what epic wants out of their case?
Yes but its is poor UI with extra friction. It's not so bad if you have a recurring subscription but it will kill you if you are trying to get users to manually pay regularly. I wouldn't be surprised if the drop in sales would account for more than the 30% fee.
This is actually a bit of a genius plan from Apple because it does not actually help epic but makes it look like they have no reason to complain now.