The problem with FNAF style games in general is that there's no tutorials whatsoever. You either have to look it up or blunder around (and probably die a whole bunch) figuring out what you're actually supposed to do and each of the enemy attack gimmicks. It's one thing with the originals since they're horror games and want to scare the shit out of you, but most of the these h-spinoffs aren't so there's no reason to for them to shove you in blind.
Another issue with the games and clones is that the bad guys tend to have a strict pattern to them, so there's really only two ways each game can go: you get fucked because you have no idea what triggers them, how they function and when,
or you know the patterns and you've solved the game, able to play it blindfolded with both hands tied behind your back. There is no middle ground, the game's either a resetfest or a cakewalk, which is why a lot of these games either have to start slipping in 9999 recolor variants of the cast, have a CUHRAAAAAZY character that acts randomly, or add in some kind of custom mode to let you fiddle with stuff.
From the perspective of a new player, your options are to either die a whole ton for basically no reason (the worst kind of difficulty), or look up a wiki of what to do and when, which kills the fun, BUT the more niche the game is, the less likely there'll be any info online, so you get this kind of thing where nobody plays the game because it's too hard, and it's too hard because nobody plays it.
Realtalk I wish more FNAF clones (the porn ones especially) were more "FNAF
inspired", offering a more generic horror vibe rather than sitting in a room flipping cameras up and down blindly.
I think the best way to do it would be more of a "Voices of the Void / Signal Simulator" vibe; you'd sit in that office checking cameras, sure, and part of your job is to monitor the cameras, but cameras go down, generators go down, wiring gets damaged. Sometimes you can catch an animatronic in the act, sometimes not. As things go down, YOU need to go out there and fix them, and the animatronics would work on simpler mechanics, like one only moves when you look, one moves when you're NOT looking, one only moves when you're in the middle of doing something, and one flips between hunting and inactive based on a hidden timer, plus some random events here and there to spice things up.
Could even follow VOTV a bit by having your security room be customizable with random physics doodads and lights and whatever, slapping in dump posters on the wall or some memey collectables you find.
TL;DR: FNAF knockoffs, porn ones included, really only appeal to FNAF fans who already play a ton of FNAF, and that's kind of a waste, IMO.