>>408284915
I don't recommend getting it just for the TF2 mod if you don't like multiplayer shooters given it's being built on top of one. They only just added the medic class and their first payload map so it's very much unpolished. 
Regardless the TF2 mod population right now is 3 full 10 player lobbies out of 80 total Contractors lobbies.
Star Wars mod is more polished and more popular. There are 7 of those, 3 of which are maxed at 16 players. 

I never have trouble finding a 16 player Star Wars lobby to join, even moreso at weekends, but sometimes I've had to host my own TF2 lobby. If those numbers look low it's because there's lots of other loadouts also being played: Halo, revolutionary war, ninjas, CoD weapon ports, Tarkovshit and even Fortnite now.