Well, they picked Amazon, which means they didn't pick someone else.
That line you're attempting to draw is so thin I've having trouble seeing it. Is it just me?
They didn't pick Amazon over anyone else. If there are other firms they can entice to open businesses in NYS, they would make a deal with them too.
All it is is like let's say Canon offering you a $200 rebate if you buy their $1500 camera. So in NYS case, they give an incentive to the company to set up shop in NYS. Then, in the many years that follow, the state collects more in taxes and jobs for their residents then the incentive cost. A simple deal.