The thing is Tactic, we can't tell if they are active and what not.
However what we can simply do but a pain in the ass to do is just,
/seen playername
Oh this person hasn't been on since 2-3 weeks ago better take out their chest shop
Rinse and repeat, a tedious task but I think it would be good for players.....
Also we should make preset chests like in the bank.
IE There are chests already setup at mt moon, you can ask to rent/purchase one Mod/Admin gives you perms you have a shop now.