I dont think that this is the case their are so many games that are full corruption or ntr with big patreons and even lot of pornos like gangbang ,bukkake and all that kinky stuff its probably a mix of alot of things but I dont think that ntr = bad or ntr = not over 100 patreons rule exist
No one said ntr = bad. But it is a fact that it is a very divisive and niche tag so much that it needs to be made OPTIONAL if you even want a chance for your game to succeed. So good games with ntr will get good support like WIAB which has 458 patreons, which is pretty good. But compare it with SG, by the same dev, and it has 1400 which is 3 times more.
The same happens with another dev: Inceton. He has a ntr patreon page "IncetonNtr" which has 379 patreons. Whereas his "Non ntr" patreon page "IncetonGames" has 2362 patreons which is 6 times more (and it used to have more than 4000 patreons before he added some small NTR to his supposedly "non ntr game", dude just loves ntr lol).
So there you can clearly see two devs that offer two options: one ntr and one "non ntr" option. They are the same person so the render quality, animations, writing, etc are all the same, yet the results are very far apart.
Then you see that the devs making the most cash, like BaDIK or NLT, tend to avoid those divise tags to try to reach a larger audience. But, you can still make good money with ntr/optional ntr games, just not as much.
and you can make even the argument that the competition is bigger between women pokemon/collecting games because they exist the most.
Yes, ntr games are a minority so supposedly they should be earning more, because they have less competition. But that doesn't really happen.