I'am absolutely sure that she knows. Remember that it was long time ago and she wasn't working all the time.
Maybe Blizzard wouldn't contacted Her, thoug it's almost impossible I think. But that was only inspired by her dance, I doubt if she registered trademark (maybe she should
. Even if, she had so much time to discover it. Maybe she played WoW
just to see it.
Maybe it's a good thing that some people recognize her dance. Exactly through such things people dig further, they want to know and ask themselves: "Who the hell she is?"