TBH not sure how far $100k will go to pay developers to maintain and add features to a site like this, if that's his bankroll he needs to be making money pretty quick off the bat.
Good point. Even if he does make that million by 18, he should still go to college. 1 million at that age isn't a lot of money considering how long he has to live. Kid seems pretty damn smart though, so I'm sure he will figure it out.
I'd still head to college though, who knows the valuable connections he could make while there.