Afaik, some activist group called Collective Shout is pushing for this, because of their belief that all porn victimizes women, even if the porn contains no real-life people involved. And they don't give a wit to context, bc gd MOUTHWASHING was also nixed. So, even if one shows rape, incest and/or extreme kink, even in a way that says some of these things are bad, that doesn't matter.
Being a cis lesbian, I find this view of theirs condescending, irrational, and wholly misinformed. It really does feel like the company is run by a group of sex-negative Gender Criticals, who don't do the few good ideas they have any justice. As long as smth is tagged well, it should still be allowed to exist.
I'm sorry this is happening to you, and I hope you figure smth out. Perhaps GameJolt?