Gay for pay...it seems like a myth to me. Hear me out:
If you can stay rock hard and aroused while fucking another man...you're most likely bisexual.
If you have no interest sexually in men, you're going to have a hard time keeping it up I'd imagine.
Honestly, labels are stupid and sexuality is a wide spectrum. I engaged in a ton of sexual activity in my 20s when I was caught up in addiction and hypersexuality that stemmed from sexual abuse. I did MFM, DP, MFMF. A ton of it. I loved group sex, it was something so hot about sharing a woman with a friend or fucking in the same bed with another couple. Hell, I still would do that stuff if I wasn't averse to the health risks (i did a lot of risky activities back then, going bareback in women I hardly knew)and wasn't in control of my impulses.
Now I prefer one on one intimate sex with a female partner. I love women, the female body is just...whew. it drives me mad. The warmth and wetness of a vagina. The scent and musk it gives off during sex makes me want to growl and fuck hard. The softness of a woman's skin on my skin feels so good. Kissing her lips. Sucking her breasts. Tasting her skin, her vagina, her ass hole. I love all of that. Women are just amazing and I want to hold them, cuddle them, protect them and love them.
I've seen some folks say you're not straight if you've done those things (MFM, group sex, DP). Fine by me. The only reason I identify as straight is because I have no interest in having sex with another man. The thought of fucking a guy in the ass does nothing for me. Not to offend my gay folks on here, because there is nothing wrong with having sex with anyone, male or female. But it just doesn't make me horny. Guys are not sexually attractive to me, hell I don't know why women want to fuck us. I don't want a big hard dick in my ass. It sounds painful as fuck. Sucking someone's dick doesn't appeal to me, and God damn I would not want to taste someone else's load.
I imagine, for my 100% gay counterparts on here, they could say the same about the idea of fucking women. It does nothing for them.
There is no amount of money that would change that. An erection is a physiological response. I would have to be aroused by the person I'm about to have sex with to achieve and maintain one.
Men aren't machines that just get hard and can fuck on cue. We have to be aroused by our partners, among other things, in order to perform sexually. So no, I don't think that guys who are straight can just be gay for pay like that. Money doesn't make dicks hard.
So the porn performers who do crossover work...they're bisexual. Both genders arouse them and they get rock hard and pound out anyone who you put in front of them. Simple as.