I think that beyond a certain level of financial success, it's the reputation and power that matters more. Marissa will never have to worry about money in her life. But power and reputation are ephemeral. Doesn't take much to ruin them.
Is there someone who matters to her who will deprive her personally (i.e. not Yahoo) of something due to having remembered this event?
I don't think CF, MM or the Ponytail, Jonathan Schwartz will work again.