According to twistedvoxel, were 28,144 NSFW games, and now only 7,008 are still available for purchase. The "Dystopian Robot Girlfriend" game may not have been removed from the store at all, which is why you were able to download it.
Is it all true?I have no idea but I found a response from one of the moderators with the nickname “No Time To Play” to a question about refunds for deleted games. The rest of the topic is also interesting (f.e. disappearance of the IWBTT game with screen).
https://itch.io/t/5121050/refunds-for-those-that-purchased-nsfw-games
Will the other, not yet removed games disappear?
You'll have to ask the CEO of Visa or Mastercard.
Why were some games spared, some shadowbaned , and some nuked?
IDK but It is possible that if the game was available for free download (too), Visa and Mastercard's blackmail did not affect its availability but what about other cases?
Sorry for chaotic post, I hope my point of view was useful.