That's correct, it depends on the game. Decisions are made on a case-by-case basis. I've let our admins know about your ticket, but as the rules of this category point out, the people you're addressing don't watch the forum so are unlikely to see your post.
Yes, it might depend on the game. But it's not fair when games with the same kind of nsfw content aren't shadowbanned like mine. Recently released games with cannibalism, decapitation and sexual assault appear on the search results while games like Sweetest Valentine(and Infectious Doctor) get to be shadowbanned. My game was doing so well before being shadowbanned. But thanks to this whole mess, the download number stagnated and I might not get the same visibility ever again.
But that's how I find the games I play. I use the tags because I look for very specific content. Besides, this is a very niche game that was a game jam submission. I already advertised it on the official discord channel for this game jam with people who like games like that and tagged it accordingly. And it worked. I was getting new downloads everyday and managed to reach more than 6.000 downloads. Until this happened and I rarely get any downloads anymore. I didn't do anything wrong when advertising my game.