Marissa was an early employee at Google, she was employee 20 there and Google's first female hire - she's worth ~$300 Million, I doubt she's doing this for the money.
well, it's more like, she has $300 Million now, but her compensation going forward now, win or lose, will probably dwarf that of staying put at Google and personal portfolio growth for the next few years. She's not doing it for the money, but her personal wealth only stands a huge boost.