This is rather odd, I also only sit at under 10% on PoC and do the dailies every day for the 5 candy and I cannot get enough to use all my metal. I have 50k metal stacked up currently and 3 of my tanks are max affection already so I am spending the candy for hearts as soon as I can. I mean I do get 2k metal around 3 times a day but then so should everybody so i'm not sure why I get such a surplus.