With the Feb 28, 2014 update, there now is the Salvage Droid mechanism for obtaining rewards. As far as I can tell, there is one free chance each day but otherwise it costs Imperial Bux to have a chance for a reward. There are three possible levels: "a chance" (5 bux), "good chance" for 15 box and the "best chance" for 25 bux.
Question 1: Does anyone have data about what the chances are for obtaining "rare" rewards with each type of mission?
What would be good to know particularly is the chance of getting a new level, and which levels are unlockable via this mechanism.
Question 2: Do the destinations for droids make any difference? There have been "debris field" and "asteroid field" listed, and the presence of the "rescan" purchase suggests that there is some difference, but I don't know what that would be.