An August promotion kicked off today that offers VISA cardholders the chance to win a $50,000 VISA card. Each time cardholders use their VISA card to make an online purchase at participating merchants between August 1 and August 31, they will be automatically entered to win. More than 20 online retailers are participating, including eBay, CDNOW, LLBean.com and Tickets.com. VISA will also give 250 first prize winners a $100 VISA card. Over 90 VISA member banks will be featuring the promotion on their Web sites. The August contest follows a successful May promotion: VISA’s `Win What You Spend X 10′. For more details, including Official Rules, visit http://www.visa.com/shoppingspree.