Stuff you should know is awesome <| sep |> IGN BenIsGoodBoyDeposited rattata lv 17 femaleBeedrill is my favourite thanks c <| sep |> Unless there is a shift of all the rescaled means , there ' s no such decay even with that low granularity . The rest is just a very discutable extrapolation in my opinion . If players don ' t play , they keep their MMR , blocking that slots of MMRs without playing . What you refer to is maybe just a virtual decay which becomes obsolete as soon as they play again , because of their increased uncertainty . So it ' s not something fixed such as the decay we saw for example in Starcraft 2 . That was a real decay . Now is there even this shift ? I don ' t know , i just know hotslogs did it , but i didn ' t read anything about it from Blizzard myself . If someone has a link i ' d be happy to know . But even with that , as said , i don ' t think it has a tangible effect because it will be cancelled as soon as the players play again .