Maybe everyone on here should go get a convention badge
Well, at least a scanned copy of one.
As far as I know and the way they did it at my former congregation as well as my current one now, the elders/book study overseer would pass out the lapel badge individually to approved publishers with the comment; "Don't lose it as this will be the only one you're getting".
I suppose it is to control the extra allotment from getting into unauthorized hands.
Alligator Wisdom (aka Brother NOT Exerting Vigorously)