If it takes around 5 minutes per card (because you can order multiple cards at once), then making even 2 dollars a card is $24 an hour, for something that isn't very complicated and doesn't feel like work. I've also at times resold them myself (with the correct capacity, and as-is), and made money that way. Some people might also like to have a fake card for fun. (It's actually quite cool the way it's hacked.)
Besides, the title was Post ridiculous munchkin ideas.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.