"Houston cut Jobs’ pitch short: He was determined to build a big company, he said, and wasn’t selling, no matter the status of the bidder" Props to Drew. I don't think many other entrepreneurs would've been as zealous and decline such an offer.
That kind of money, Drew's payout would have been substantial, enough to bankroll any project he could dream of (or live comfortably forever).
He must really believe in what he's doing.
Sure, one could argue that money is less important than achieving a vision, but with that kind of money, Drew could work on 5 additional visions of similar size, knowing his product was in good hands.
maybe dropbox is that project...