$2M isn't really $2M. Spread it out over 4 years as $300k the first year, $400k the second, $500k the third, $800k the fourth. This is what's called 'golden handcuffs.'
If he truly believed RoomScan could be a massive success and the market was showing adoption, his expected value is much higher for sticking with RoomScan, especially as he had sold his last company and didn't /need/ a few extra hundred thousand dollars that year or the next year in order to be happy.
If he truly believed RoomScan could be a massive success and the market was showing adoption, his expected value is much higher for sticking with RoomScan, especially as he had sold his last company and didn't /need/ a few extra hundred thousand dollars that year or the next year in order to be happy.