I suggest to remove all inactive admins which aren't playing on the servers.Beacuse in my opinion admins should be active every day and do theyr duty as much time as possible.As I am an admin on Setti's server I will try to be active as much as I can every day.
If there would be atleast 3 admins on the server most of the time I'm pretty sure that servers would get alive again just like in the good old times.
If you would remove inactive admins we should get new ones,so you could create a advertisement (chat advertisement) on the servers which would say that Setti needs new admins and they can apply on the forum BUT there should be Admin Application Format on the forum which would contain requirements to become an admin of the Setti server(s),for example "Total Connection Time must be atleast 10 days" , "You must be active every day for atleast 3 hours per day" "You must have good reputation in the Setti community"...And ofcourse an Admin Application Format something like this:
Your in-game name: Your forum name: Total connection time (can be checked at HLstatsX): Are you gonna be active every day for atleast 3 hours per day? : Why did you applied for admin,what can Setti community expect from your admin status?: . . .
Also we have great non-steam version of CSS and we should advertise it somewhere so more people would download it and play on Setti's servers.
These are just a few ideas of mine to get Setti servers more populated.
So the key of all are admins in my opinion.Admins must be active as much as they can every day to attract other players to join the server and stay as a member of Setti community.