Amber's not dumb, she's just a pushover. She had a talk with Cody like in the second week where she said she suspected that when it got down to the final 8 with only BS members, she and Christine would be the first two to get kicked off because they're girls. So it's not like she doesn't know what's going on.
!!! this is why i think once it gets to the jury, she will definitely play a diff game
Amber tries to be fair to the females in the house. Other than Caleb () she's the only person in the house who's made it a point to refuse to nominate only girls when she was HOH, and she just told Cody that she didn't like seeing all females nominated.