Why may First-Mover actually Disadvantage the Cheater?

-The Payoff Matrix may work Against the Firm that is attempting to Move First. Say the 'First Mover' can get a Huge Profit -If they Overestimate Demand, they risk making Huge Losses and risk Collapsing -Rivals can use the Technology the First Mover had Researched and Developed for a Lot Less.