I have seen Catzreview fights with clumps of hair pulled out, but I guess it depends how far the girls want to go with that tactic and whether they want to risk having their opponent do the same thing to them.
They don't allow face slapping, punching or scratching. But apart from that, I think it's anything goes.
This one is pretty intense and bad tempered. It starts off 50/50, then gets one-sided towards the end as the stronger girl wears the other one down, which is a good way for a catfight to progress, for me.
It's a little odd that Amethyst didn't want to do a topless fight, but after Jessica claws her breasts, she pulls one of them out of her bra and shows it to the camera "Look what that bitch did to me!" Lol.