@DanieltheDead: Angry Joe didn't understand what he was buying and spent his currency very unwisely. He should have unlocked the mercenaries he wanted to play before trying to get certain loadouts. The different loadouts don't make much of a difference once you get up to the bronze tier. So AngryJoe wasted a ton of currency chasing completely pointless silver/gold/cobalt cards.
The bronze cards in this game have the exact same amount of perks as silver/gold/cobalt cards. The only difference between bronzes and the upper tiers are some different vanity skins that have no affect on gameplay.
And it's extremely easy to get bronze cards just from the free cases the game gives you as you play and level up. The only thing you really have to grind/purchase to get are the mercenaries themselves, which is a pretty common tactic in free to play games.