its all some sort of excell macro that basically has an algorithm not many people like or feel is random. when a guy who does crappy in a match gets the exotic drop it does tend to make you not care. the people who do bad should not be rewarded on a high lvl. anyhow something is being used to generate these prizes so i am going upon the attribute of you are on your own ranking system and you go up against others in their ranking system. one should be judge by the metals you get in the maps or at least these things give your perks to find objects in the matches.