This is so stupid, honestly. This guy paid for the game to have no NTR or similar content, and the game got some sort of cheating/NTR elements in it. Why the fuck would a dev add something he explicitly said he wouldn't add? Only to add it after the game got enough money for him to be comfortable pulling this shit? It's sickening.
Of course, people will be stupid and say, 'Oh, it's not that serious,' or whatever. The dev should've ripped off the bandaid and said, 'Oh, I am thinking of adding bad endings to the game where you'll be watching other girls fuck and stuff.' None of which was mentioned until the game got popular and he made enough to again be comfortable pulling this shit.