Board Thread:Suggestions forum/@comment-32865299-20171023165419/@comment-26553378-20171024131849

I would assume that other kings would know of the dark effects of sauron's rings, however I will agree that it doesn't make sense that he didn't make some for kings loyal to him. I would guess it has to do with him having a corporeal form. After all, he didn't make any after losing a physical form.