And you don't need FU money to have more than one option available that prevents your family from starving. Others may disagree, but I thought this was a bit hyperbolic and cliche. There are millions of shades of gray between $170 million and poverty, and I can't imagine the Mint guys, and their families, were going to go hungry if they didn't accept this deal.
But I get what you mean, and I'm inclined to agree with your larger point. The founders of Mint aren't beholden to anyone but themselves and their shareholders, and I wouldn't expect them to put their lives on hold for my comfort, convenience, and need to have faith in the goodness of mankind. In the same position, I'd have done the same.
The solution to this, if Intuit completely drops the ball in managing Mint well, is for someone else to launch another competitor to take Intuit on. That gets the best of both worlds, people getting rewarded for creating something great, and people always have another option outside of Intuit.