Asking people to get on the server won't do much, you need to get them to want to join themselves. The other Taki Life server right now has more players because it doesn't have OPFOR and INDEP so people can be civilians and roleplay in peace. It also has things like a court system, proper southern government, cops that actually act like cops. Monthly / Bi-monthly updates are a good idea, maybe implement something new in each one. Events are also good but events are more successful when you already have a well-established population, I don't think it will do much with a small population.
I've given some ideas before in the suggestions forums to remove INDEP, change the map to Chernarus and some other minor stuff. In my opinion, if you want to stay alive and successful compete with the other server you need to bring something new to the table. The only reason TLX had a stable population like a month ago was because it was the only Taki Life server, now there is competition, and you need to compete for the player base, asking people to join won't be enough.