Considering the average human being either pisses their money up the wall (drinks) or smokes it up, why not have a hobby in buying cardboard??
Of course, it's the high-end stuff that hurts, but it's the smaller stuff that make it fun!!
What would you do with $100 from card sales? Buy a couple of DVDs or say a good night out on the town. Then what will you have? Hmmmmmm...