Can always make a forum post summarizing all the commands and what they do. Short list of tips and pointers. Sticky and lock it.
Unless that's already posted somewhere.
Not everyone's played modded servers so they are not aware of the !buy menu, I was surprised tbh that there were other tips in game such as access to !light but not a tip on how to access the menu. --- unless it's there too, been playing on this server too long, too desensitized to everything in chat lol.