I could see that as well. Though, honestly, I still say it depends on the girls. ECNWC video tape with Holly vs Taylor wasn't near as brutal or hard as the other tapes ECNWC has. They fought with the same rules, and while I don't know if the winner wins more or not, but in those types of matches, I'd probably want to be more aggressive since you never know what the other girl would do to you. The entire match was just body shots that seemed kind of slow, and each time it began picking up, the round ended.
I also saw another match from a site...I can't remember what it was, but the pay did depend on the winner. And the one girl was completely not into it. Whenever she started losing, she quickly surrendered. But she didn't throw a punch the entire match or anything. I think the girl really decides it, because I think the producers of the kind of videos you're talking to, kind of pray on girls they can convince to do it whether they really want to or not. They begin saying how they'll pay them and they won't get hurt and stuff. But then when it starts, the girls realize 'Oh shit, this is for real.' And some of them are ok and love fighting. But some are terrified. From the very few Crystal videos I've seen (I've seen very very few, since like I said, it's not my thing), I've seen a few girls who were pumped in interviews, but once it started they got very scared.