To my knowledge, this is still active. Someone else (and or Bungie) may say I'm wrong, but this is what their latest info about it is. [quote]Decay Players that achieve the Gold III Division rating or higher may notice their Division rating begin to decay due to inactivity. Gold III Division players and higher will be awarded one Decay Protection Point upon completing a match; moreover, players should be aware that they can only hold 12 Decay Protection Points at any given time. A player's Division rating will begin to decay if they become inactive by not regularly playing Crucible Competitive Division matches. Lastly, every week during the Weekly Reset three Decay Protection Points will be subtracted from a player's total. If a player has less than three Decay Protection Points they will instead lose 250 Division Points.[/quote] https://help.bungie.net/hc/en-us/articles/11269047447956-Crucible-Competitive-Divisions