A guy needs food. He is hungry. All he has is $3 cash and $15 on a DC card. Instead of using the card for $15 worth of food he tries to ask visitors if he could use his cc to buy them goods in return for cash so he could eat. He didn't use his card because casino food was too expensive and his card mysteriously didn't work at Mcdonalds.
This guy reminds me of one of the dummy murderers they interview on The First 48 and they tell the craziest lie because they don't know any better.