I’m not being taken advantage of. He got a nice ass and I like to look at it. It’s entertainment. I have no plans of dating him in real life.
Also, his body type and openness with his sexuality appeals to queer men. I don’t watch straight porn, but of those names you listed, I believe Mazee the Great, Nat Turner, and Rickey Johnson all are very well-endowed in terms on their penis and they mainly have sex with women on camera. They are professional pornstars.
Generally, straight woman are not interested in watching solo porn of a man to the extent that man can make lots of money. Grandy has a nice penis, but it’s not generally big enough to suit straight porn watchers who are typically male and want to see a woman get rammed and slutted out. The straights mainly care about the guy having a big penis and muscles and being aggressive. With Black men, darker “buck” type men are fetishized especially in interracial scenes.
But Grandy does a big ass and a pretty face. And queer men like that. So he can easily do inexpensive solo scenes and make a good profit.