Why do gay porn star do "Straight for pay"?

Hello there you guys(please don't be dismissive). I recently came across a "Straight for pay" scene with HotGuysFuck's Jake Davis. Someone vid said he was bisexual with a finance the other said he was gay so I asked BlurredMedia themselves what he is they said "he doesn't know these days" so basically bi, but in doing so they mentioned a past S4P scene (previously mentioned her)with Alex Griffen, in his first solo with GayHoopla he says he's gay but the first thing he jacked off to was lesbian porn, so I'm guessing he might actually be bisexual, just heavily leaning towards gay.Another scene they gave me an image preview of from their HGF site that features Sarah Sunday, Caden Carli, And Collion Simpson. I know Collion is bisexual and Caden is apparently gay (based on vids I've seen super gay). The scene premieres on the 20th of april 2018. Does anyone know why Griffen and Caden did it? Does any one know why gay porn stars do S4P? I get it when a straight guy goes G4P because it pays more, and I get when a closet case in denial has sex with woman(because he's in denial) but it seems like a lose-lose for a gay guy to go S4P.It's been driving me nuts for the past few days. Any answers? And please don't be dismissive