Why doesn’t Xbox Game Pass include every Call of Duty game?

You see the clips make the rounds on social media every few months: futuristic soldiers, space battles, grappling hooks. The game depicted isn’t some hidden-gem sci-fi game waiting to be discovered. It’s Call of Duty: Infinite Warfare, and despite wanting to play quite badly, I’ve abstained from buying it for the past several years. Wouldn’t you? Seriously, how many times have you been burned by buying a game only for it to hit Game Pass, or some other subscription service, immediately after?