You are right on to make that post. And yes it is becoming more and more common. I just want to ad my 2 cents in as well: A one time use credit card are good to make a purchace online but the are a few downfalls~you can't use them to pay month;y bills, rent a car and sometimes will not work at all because for insatnce someone using a discover card may have the same exp. date that is on you one time use card. But you were right on when saying no worries: Hackers have no use for a credit card of that type.