Right. Instead people stick around and play for two YEARS, then something happens.
The resolution of the graphic is only in years. I don't think there's a sudden drop, I'm fairly sure if I were to resolve this to months, it would be a fairly level decline.
And quite frankly, 2 years is pretty good. How many AAA games have you played for 2 years? I'm pretty sure I can count them on one hand.