@ampersandrew @simple Whenever someone says that X ruined Y, I always hypothesize that it may be the opposite case: the reason why so many copied its addictive nature is because the publishers themselves were already searching for ways to maximize player engagement, and therefore increased revenue through monetization.

COD itself didn't ruin multiplayer games, it only showed an easy and replicable way

If you may forgive the metaphor: a weed can only spread if the soil itself is fertile