Gay porn stars that are straight

However, from the stories I hear about male pornstars, many say that a great number of them are indeed straight and are in for the money. From what I hear, men are not that valuable in straight porn industry and don't get paid much, about 50~ bucks a scene, but they're in high demand in gay porn industry, getting paid about ~ per scene.
The gay ones? They were everywhere. Why would that be? Men are the stars in gay porn and simply a prop in heterosexual porn. It makes sense that gay performers would be given the star treatment -- from G-rated model shoots to triple-X peep pics. Conversely, straight performers act as the velvet pillow for the crown jewels (women).