This site lists 1600 active members. I would be surprised if more than 160 carried RDS. I don't think that the group thinks they are a necessity.
The other part, well, I am the guy that Hack is being so subtly sarcastic about. I gots a dot, a kydex holster, both are in a junk position, I certainly have gone to classes wearing LBVs, and I am almost a pharmacist. Seems like I been canceled first.