Kin jin never droped more than 1 bead whatever the drop rate was on GC if you did solo runs, I can't remember if he actually did give more than 1 if you did the larger party runs because I usually was the one tanking KJ and reloging. But do you think they would actually do something about this until the server goes bankrupt?
I might be worng, but I think I've seen him dropping more than 1 bead when I went there with a party. As for your question, no, I don't think so...