Re: Seems he signed the agreement
Nope, you can challenge this at your convenience, which may not be at Amazon's convenience. Want the gig? Sure, sign that hinky legal. Time to bounce? Move to California and get on with your life. Corporate personhood means that they do not a priori have a position of superiority. Google might even fight this just to open the floodgates to Amazon talent. Surely this is one way traffic.