I stumbled across this trope the other day in an index and clicked on it just to see what on earth the name was getting at. The trope itself is relatively simple and common but seems to have been languishing in obscurity for years, probably due to Trope-Namer Syndrome
. The YKKTW history also seems to indicate it was a rushed launch (at least, judging by the replies and edits; I think it only shows a single hat because it predates the hats system).
(This is the first thread I've created here, by the way; I hope I didn't mess it up.)