One of my daily challenges today was collecting Division Tech from the Dark Zone. I spent a while getting killed by AI, then Rouges, and when I finally found one of the Division Tech spawn areas there was nothing there. I waited for it to respawn but got murderized when all the Elite enemies spawned back in in the area. I decided to look and see if the reward for the challenge was worth all this and I found out it just gives a load of XP. Since the dailies aren't available until you reach level 30, what's the point in getting XP bonuses for completing them? Is there an end game use for XP I'm not aware of?