Sounds like you're just missing the spacer that goes just underneath the cambertop bearing.. The clunking is the slack that the spacer should fix up.
Could possibly just add washers or find one that would be about the right size?
Note the circle things next to the allen key
Benefits from the camber tops, is the camber and the better steering response. No flex in the metal tops compared to oem rubber ones.
The extra camber in a way won't give you more tyre wear. It just won't spread the tyre wear evenly, [ie. wear out more on the inside]. Toe would wear your tyres out more.
Up to you whether you want to continue running them. Just fix em up with a spacer/washer, [a matter of taking it back out, putting a washer/spacer under it and putting it back in ..]