The rule is one month inactivity.
Region: ab115
Owner: xV1P3RZx
Inactive for: 20 months
Region: ab114
Owner: MrNuggly, MrSuperRed
Inactive for: 40 months, 8 months
Region: abisland1
Owner: Dolphin_Prodigy
Inactive for: 48 months
Region: abcm6
Owner: PHD_Banana
Inactive for: 9 months