Too Long; Didn't Read
The Overjustification Effect is a phenomenon in which being rewarded for doing something actually diminishes the intrinsic motivation to perform that action. Destiny 2's recent move to the F2P model (Free 2 Play) provided a much needed boost in returning players and in my opinion is one of the standard bearers for the AAA blockbuster model in question. To do so, developers need to provide a fun experience for a broad audience, creating a reason to keep players coming back for more. For the GaaS model, the basic motivation is to provide the promise of a reward or reward.