Would you buy Etheric light from Xûr or grind for it?
Edit: Remember, Xûr's strange coins are losing purpose cuz we've all gained exotics he sells
Edit 2: Once a week
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I'd rather he didn't because you'd have people buy them in bulk in the first week and have 3 34 characters. It would be the equivalent of him selling raid gear, which people wouldn't like either.