"Pretty sure they"...
Nope, I'll stop you right there. And the context is porn. Note, again, the term being discussed is not Black, which is perfectly kosher, but referring to Black people as "blacks", which is considered dehumanizing.
As for alternatives, the existing PoC-run reddit communities are called Ebony, GoneWildColor, GWBlackGirls, etc. Hopefully that gives you some insight.
Exactly right, but the context being discussed is porn.