I was told that adding an empty server.cs file to faces will allow for people to download them like add-ons. To my knowledge this didn't "break" any game functions or anything, and wasn't against any rules.
Later on I tried making a new custom face. I think it's pretty good, but I want to make it so when people come on my server, they can download it along with all my other mods. This seemed to work with a few faces, but not my new face. They show up in the add-on list, but my new one does not. And I checked and rechecked and checked again, and no matter what I do, it will not show up. I have a namecheck, a server.cs, a description, and everything else I need. It shows up as a face fine, but not in the add-on list. :/