Sorry for the shitty phone screenshots, I don't have my PC with my right now. I have an old discord account that's in a lot of porn servers and after seeing that post I decided to check if I could find anything related to her on them. I found a user called Anna (epicmommygf) and we share 10 mutual servers, 8 of them being "blacked" related.
Anyways I didn't post this before because I was not sure this is really her even though the account looks legit (old user, purchased nitro and her original username is the same as her Reddit: aniku) and because she didn't really post anything on those servers. She joined all of them in the same week in August last year, posted two "DMs open" messages in one of the servers and those 5 rule34 videos in that other one.
She was also in another server called "BLACKEDCORE" and she picked the "Looking for promotion/partnership" role or something like that, unfortunately that server got deleted and I didn't screenshot it at the time, but that goes in line with what that guy said.