Update? Update!
pl_rust is now unversioned, since we don't need to version anymore with the Workshop tools.
Except that most of the most popular servers running custom payload maps (including ours) don't use the workshop, because we want control over the maps we host, so that we can test a map for stability/bugs BEFORE we deploy it to a live server.
If you guys want your maps to get any decent amount of play on custom map servers that actually still fill up everyday, I'd avoid going the "workshop-only" route, and keep versioning your maps.