Uh,
Really???...
That would be a type of discrimination, don't you think?
In addition, it is not Apple's place to police developers and/or inquire/intervene into developer activities!
Apple lets anyone and everyone be an app developer and to develop apps for iOS.
That is why there are millions of apps for iOS in the iOS App Store.
There are young kids developing apps!
There are older users that develope apps!
It's very hard to create apps and make money or some kind of living from developing and creating an app or series of apps!
You need to get real about this!
You need to accept that not every app in the iOS App Store is going to be a resounding successes and the developers of apps are going to support their software creations forever!
That, realistically, just isn't going to happen.
And it's not up to Apple what happens to an app/s or its developer/s.
App developers pay Apple a hefty percentage to sell their apps in the iOS App Store.
Your “beef” is with the developers of Photogene.
I have/use more than one photo/image editing app just to cover for just this type of contingency/eventuality!
Find alternatives to Photogene to use just in case Photogene never gets an anymore updates!
I, also, use,
Pixelmator
Polarr
Affinity Photo.
Good Luck to you and your search for alternative image editing apps!