If the 30% is such a big deal, why not build Fortnight for the web and let players log in via their browsers? It doesn't seem like Fortnight uses many, if any, of the native iOS API. I feel like they spent a bunch of money on lawyers, when instead they could've invested it in building out their technology infrastructure... which could have in turn benefitted many Unreal Engine developers.
Because Epic doesn’t care about Fortnite. They want to provide their own App Store for iPhones, and just take their own 29% (or whatever) from other developers.