We had this talk, huh? So we are going to have it again.
So how does it work? It's simple, you don't play games then your rating will start decaying to allow you for easier time in coming back to the game/not holding place in ladder when you are no longer here.
Should it work for all ranges of players? Nope, it shouldn't as clearly you can't fall below certain level of gameplay mechanics no matter the game, after all you just don't forget how to drive a bike right? You might get slower/exhaust faster but you still know how to ride it. But then again if you don't wanna discriminate then getting different decay values won't be a problem in balancing it. Not to say hard cap can also be used to make it so you won't drop too low, like say 300/400 points maximum after not playing for 3 months. With decay starting after 1 month of not playing and slowly decaying until it hits the cap.
And why do I want to discus it? Cuz at the moment my rating is what is holding me back from actually playing the game, I just can't play it or am willing to put as much time as Gala to be able to come back and play relatively on the level my rating suggests. Literally making me either go and Int in games to lose rating resulting in ban, yeah funny, or just straight up ruining games and making other people rage cuz much mah 1.9k can't carry for shit. Which get's even better when you consider who I would be put against as currently people like yudi/foley were just around 100 points rated more but play the game few times a week when I didn't touch it for months.
Tl:dr : I'm making a smurf f*** you.