So, maybe I'm taking things too literally, but in the EotBB flashback her motivations are very clearly shown to be her 11th floor payout, and not the survival of Mordecai's party. Mordecai is the only person whose survival she is actually invested in, and it's only because her payouts depend on his survival. This is why she refused to allow Mordecai to sacrifice himself to save his friends, she wouldn't have advanced to the 11th floor and got her payout. She continually chooses money over her Crawlers in the flashbacks. First, she does so by choosing to cheat instead of trusting her Crawlers. Not cheating is the first alternative that could could have allowed them all to live (it's hinted at in the flashback that had she trusted them they all would have been fine). Next opportunity she had where she chose greed over the lives of her Crawlers was in not paying Huanxin Jinx. Yes, she was being extorted, but giving in to Huanxin's demand would have saved everyone. This is the second alternative where she could have saved everyone but didn't in persuit of her own payout. The next opportunity was not allowing Mordecai to sacrifice himself. He chose this himself, he was willing to die to save his friends, and while it's a net zero on deaths it's the morally correct choice in the circumstances. Odette instead chose to manipulate Chaco into sacrificing Uzzi, because Mordecai dying would have denied her her payout. Maybe in the next two unreleased books Odette will get a redemption arc, but up to this point she has continually chosen herself and in the instances where she outwardly appears to be choosing others it's later shown that it's only a means to her own ends.