1. Add a cooldown, it's as simple as that. Or - 2. Limit the type of bosses exotics can drop from; let only higher leveled strike bosses have a chance to drop exotics. 3. Make them more expensive. Bungie has openly said the drop rate is too damn high. After all, it's about the journey, not the destination. I agree with Bungie when they say you should have a story behind every exotic. I still think TTK is wonderful, they've done such good work with this. Faith restored Bungie! Edit: I guess they're patching this, or have already. I tried it out and only got 2 exotics from like 20 coins. Also, people were confused as to why I care what other people do with the game, so let me elaborate. Destiny is a social game, a social experience. Other people matter; we have larger group raid activities, Crucible, Iron Banner, Trials of Osiris... All of these are activities where you interact with other players, and your experience in these activities changes based on who those players are, and what those players are using. A vast majority of people who didn't use this exploit will be left in the dust as this DLC moves forward, with Iron Banner, Trials of Osiris, Raids, etc.