Yes we may have all the fancy servers on many different games but this isn't enough.
This is how we can improve the server:
1) Make the Steam group open to the public. I rather prefer a community that is open rather than have you guys invite people to it as it shows if the community is growing or not. The more people that represent [GR] the better as it will boost player count in many other Area 51 "dead" server. I may understand that you guys would rather prefer an enclosed community with trusted members but remember that if the people see that our community is open instead of being closed to people who care about it, they will come back to play on the servers once more. Who knows they may even donate, cause realistically let's be honest here, you guys made these servers to make money, so let's improve on that factor and maybe more cash will flow towards your guys way in order to sustain you and even improve the server gear.
2) Expand to other games. I'm not talking about making more TF2, HL2:DM Servers. I'm talking about other games such as Garry's mod and CS:GO. Yes you guys do have 2 CS:GO servers but I want to see more. If I would be honest with you, a Prop hunt server for Garry's mod would be your best bet for a successful start.
I want to see Gmod servers soon. Prop hunt and TTT would be ideal.
3) Do giveaways, for example you can announce a points giveaway on the Steam group and if the deathrun server reaches let's say 20 players you giveaway points to players in order to keep them coming back to the servers.
4) Remove any dead servers for example the HL2:DM Deathmatch mod. I mean I would understand why you would want to keep a server but honestly, it's just a waste of space. Look at the player count for the past month.

It only reached 4 players. When I set-up a prop hunt server for Gmod, I instantly got like 10 players.
Keep expanding servers but get rid of waste servers.
At the moment these are the only ideas I got in my head.
If you think I'm trying to say this community is bad (player count wise) then you're correct.
It is bad as it's not growing and it's dying out slowly. I'm trying to make a difference here by giving you guys easy and simple idea's which could boost your community a lot.
So listen to these idea's and you'll be happy and also have no regrets.