Meet'N'Fuck Games

What's the reason for Meet'N'Fuck to not make a game with different species for a porn game? I know there was the Xmas Payrise 7 where Mrs. Claus gets fucked by an yeti, but the the yeti turned out to be and elf in a robot suit. And the newest Mrs. Megamounds game's original story had to be changed to replacing the goblins with humans. What's the reason behind this slight ban against mixed species sex games on this website?

Other than the artist's personal tastes and standards, I'm pretty sure 99% of it has to do with CCBill and their standards and ethical/moral views. If I recall correctly, a few of Tilda's games in the past had to be removed because they were too dark and gritty because of this.