Whenever i consult with the Crucible Quartermaster to exchange my Spinmetal for Crucible Marks, I appear to be trading Crucible Marks for Spinmetal. I shunt my cursor to the selection of redundant materials garnered from the Game-World, highlighting, for example, "Spinmetal" and I select this option. Suddenly, my Crucible Marks move from "22/10" to "12/10" and I receive that message in the right hand side of the screen saying I have now acquired 20 Spinmetal. Now, this would be, I guess, perfectly all right, IF there was a practical use for Spinmetal-- OTHER THAN TRADING IT FOR CRUCIBLE MARKS. So, I am making a transaction for a virtually useless item. Why is this? Why is it this issue appears to be effecting no other user of the Destiny-Bungie game world? I would appreciate some clarification...