Weird, because Apple took down Fortnite for enabling a direct buy-button (bypassing IAP) after review completed. Just because an offending feature wasn't enabled at the time of review absolutely does not mean you're in the clear to turn it on after the review is complete. Whereas before you'd get the opportunity to fix anything like that during the review process, by sidestepping the review process you'd better be confident you don't ever ship anything that wouldn't pass.