Last night I hit the max infamy rank in Gambit for the second time, but I am not able to reset the rank to get the second item from the Drifter. It appears that the rank reset by itself, because now I'm back at the beginning rank, but I didn't do it and I didn't receive anything for it. I was playing on two different characters last night, my Titan and my Warlock, and I checked both and neither of them have the quest step to take back to the Drifter to get the reward.