Same incentive as everywhere. They get paid. ;-) Even the most automated of robotic factories on earth still have a number of humans in an oversight role, wher

Same incentive as everywhere. They get paid. ;-) Even the most automated of robotic factories on earth still have a number of humans in an oversight role, where they make themselves quite useful. The same would be true of any space industry. People would be hired on for a tour in space, and they'd be paid sufficient salary to make it worth their while.