You'd be surprised how many non-black women wouldn't consider him black. That's how some chicks who don't do scenes with black men operate in the industry. He has enough ambiguity/mixed features to "fool" some women. For example, Alex Jones(the pornstar) is biracial but because his European features are a lot more prominent, a lot of women will work with him not knowing he's black, or they do know his racial makeup but he's passable enough to not be interracial in their eyes aka "too black". And like mentioned before, Xander is biracial, but you would never know. Ricky Johnson is also biracial but he passes for black and that's evident in him being labeled Brazzers' first black male contract star or something. You won't see Xander on Blacked and therefore women aren't going to demand a premium to work with him because they don't see him as black. Stallion is mixed, but his skin tone, facial features and hair texture allow him to pass as a non black latino. Meanwhile, SB is just black. Dark skin, African facial features, hair texture(in his facial hair). He looks like Gary Payton.
Basically, a lot of these women know the game they're playing and their understanding of blackness often doesn't go past financial incentive. I mean we're talking about an industry when women have done everything from Kink.com bondage piss scenes to 10 man bukkakes but when it was time to do standard boy/girl scene with Mandigo, had to call their mother and ask them for permission. Didn't wanna rant for too long, but I wanted to hit all the main points.