So the issue you have is with digital media in general.
Yes, I stated as much in many posts now. I am not blaming Apple, Epic, Devos, or any individual or entity for this issue, but just stating flaws for having a digital app library, especially for gaming. Retro-gaming is a pretty big thing now, but it looks like it won't be possible for many iOS titles in the future.
That’s not an App Store problem or an Infinity Blade problem.
It is though. I am not saying either is to blame, but it is the inherent problem of being a part of a digital library that the user has little control over what stays and what goes.
It’s a problem with Netflix if they decide they no longer will carry a movie you want to see (fortunately you can find it elsewhere).
Not really the same thing, as it is subscription based, and pretty much can find the same content multiple locations including physical media.
That was a problem when Apple went to Mac OS X, and again to strictly 64-but architecture.
Also not the same thing, as you can still use many apps and most games on old OS versions with using old hardware or emulation. This is not possible, or at least realistic with iOS hardware and apps.
That’s the deal with digital media distribution.
That is what all my posts have been about, I felt I was pretty clear about this, maybe I wasn't.
I think that it hasn't really gone noticed that much before, but with a big named title like Infinity Blade being pulled from the App Store, it really shows that nothing is safe.