The only thing that can drop from Crimson doubles post game rewards are ghost shells and shaders and possibly engrams and weapons. Exotics can drop from using three of coins. And there are 2 free emotes being given out, they are available at the emote kiosk. Visit lord Shaxx for the bounties for the event. The bounties are weekly and don't refresh daily. More info: https://www.bungie.net/en/Forum/Post/190897555/0/0