In this new model, the "exclusive" isn't the game code—it's the access pipeline . If a game is a CloudFront Exclusive, it runs on a potato laptop, a MacBook, an iPhone, a smart TV remote, or a refrigerator screen. The hardware is irrelevant.

Create a distribution - Amazon CloudFront - AWS Documentation

CloudFront allows developers to serve "private content" using signed URLs or cookies. This is how they manage exclusive closed betas or early-access previews for specific players.