AZ-Stalker's post in New to W3D was marked as the answer
Welcome! As far as I know (and feel free to correct me, anyone) it goes something like this: 1. W3D Hub has multiple games in development, but only APB and TSR are available to the public as of yet. A lot of hard work is being done to get the other games ready for everyone to enjoy in (hopefully) the near future! So stay tuned as the developers post news updates on the W3D Hub forum from time to time. 2. I think the TSR server has been having some issues with online stability, and TSR is getting a pretty big overhaul and update to bring it to the next level, as such, the focus has been taken off TSR until it's ready to wow everyone with the best version W3D Hub developers can create with current technical improvements, aesthetic upgrades and gameplay rebalancing. It'll be back up and fun as ever, just give it some time. 3. Currently, as to not split the community, there is only one official server per game. Once the community grows beyond the server's maximum player capacity for any specific game, I'm sure another one would get set up to compensate for the increased interest or something along those lines.
Hopefully that gives you some insight on everything you're wondering about! Welcome to the community!