Le'ts say we decay 1000 over the course of not playing PvP for approximately two weeks starting from high plat (2 or 3).
Why do we lose 650~700 the first week, but then lose 300~350 the second week?
Why do we lose more at higher ranks than at lower ranks during the same time interval?
It's not like after a week of not playing we lose the ability to play 5v5 sPvP. The game mode hasn't changed enough to warrant such drastic differences.