Today and yesterday I was attempting to farm strange coins to purchase some of that sweet loot from Xur; however, was earning only 1 coin per fireteam portal activity. Once I finally gathered 47 coins, bought the special coin Favor of the Nine at Xur's.. now I am getting only 2 coins per activity. I definitely used to get 6 or 7 a pop. Is this change correct and if so, why?