He's no different to anyone else in there, they all playing the game, just in different ways.
They all sat there and said they didn't care about or want the money, but Charlie soon spoke up when Vash suggested they tell BB to just give the money to charity didn't he?
Make no mistake, they would ALL like to win, some are just so desperate though it's hilarious.
Marcus and Siavash are the LEAST bothered.