The thing about Bibby is that he has a player option for next year. So he can either come back to Sac and make his 11mil, or go to a contender for less money. If he wants to win and get out of Sac, he has to play well down the stretch to earn the most possible for next year.
If I was him, I'd stay and take the 11 or 12 mil personally. I am selfish and could care less about winning games.