I think you are not aware, this topic was discussed several months ago, the posts must be buried in the forum and unfortunately I do not have the links.
But in short, what is happening to you has happened to many other NSFW game developers.
The admin said that there is no change in itch's policies and that this only affected a number of games that put itch at risk. (I don't remember the exact words) and there is not much more official information.
All the rest is just speculation on the part of users, some believe it is because of the percentage that those games deliver to itch, others because they violate paypal rules, etc.
The problem is there is no clear pattern, there are games that share 10% with itch (the default value) and have been affected.
There are games with vanilla content that have been affected, while others with much more controversial content have not.
The facts are that NSFW games have been receiving that message and so far I have never heard of anyone who managed to reverse the measure, this suggests that it is not an error, but that there is something that led to making that decision, but that officially It has never been clarified.
EDIT: Here
https://itch.io/t/2809361/will-adult-games-be-forced-into-direct-payments-instea...