Lora bit Sarah on the thigh I think. Also, they're not professional mma fighters - a loss doesn't matter at all to anyone involved, and it certainly wasn't done to protect Sarah's record for the future as I don't think she's fought competitively since, or at least not a lot. In fact, if anything, more people would buy the fight to see Sarah lose, there's a reason Mila vs Nikki is so popular.
It's disappointing it ended like it did but there was no conspiracy. It's content for a tiny fetish crowd not the olympics.