I've just started the missions handed out to me by Petra and Variks, but I have no idea as to what significance they have in the game altogether. Do the missions eventually reveal something about the Awoken from the battle at Saturn? Or are they just meant to keep you busy? (Note: if there IS some kind of important plot point, don't say what it is because I wanna figure it out on my own. ^_^)
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They give you an exotic scout rifle, but other than that there pointless.