Link Your Visa For Citgo Rewards -After every 8 qualifying purchases of $20 or more, you will be sent redemption instructions and a unique code to request your free $15 CITGO Gift Card. -Promo ends 09/20/12. -Limit one qualifying purchase per day (12:00 a.m. midnight to 11:59 p.m. central standard time) per enrolled member. So [...]