So basically fanbox has said that they wont allow a lot of things. You can see the more detailed info here:
https://twitter.com/pixiv/status/1592431082208886787
I do not plan to change the content of what I draw. I heard that there is actually no change and this is about real CP and real snuff that's being delivered on fanbox(?), however this is just a rumor. I will see what happens on the end of November. If they banned drawn images, I might be migrating to subscribestar.