I don't think Siavash was talking about giving the money to charidee so viewers would want him to win. He didn't even want to make a big deal out of it, but the others all drew the wrong conclusions and made out that he'd demanded they give the money away, when it was only an idea.
I still don't want him to win, though. He is a people pleasing wet drip and I wouldn't like to see that rewarded. Sophie might be daft, but at least she has some convictions.