Have your eye on a discount specific to a credit/debit card but you don't own the card? You're just where you need to be. Use Circles to search for cardholders who are willing to complete transactions using their credit/debit card.
Don't let your credit/debit card sit idle. Get rewarded for accepting a request to use your card (you don't have to share your card details). Earn 20% of the discount you helped avail.
NOTE: You will never need to share Credit/Debit card details with anyone, not even us.