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The Real Reason Wal-Mart & Starbucks Want You to Get Their Rewards Debit Cards
walmart · Credit.com

Starbucks and Wal-Mart are looking a lot more like banks lately. Starbucks just announced a new debit card that sounds a lot like an airline miles card, while Wal-Mart is about ramp up its cash-back and other benefits on some transactions run through its plastic. What's in it for these big retailers? And for you?

The "for you" part is pretty easy: free money, or free stuff.

Starbucks fans already get "stars," like airline points, when they shop at the coffee giant's stores. And millions of them also use something that's similar to a Starbucks credit card — an app or gift card that's pre-loaded with cash. So the transition to Starbucks plastic that can be used anywhere is quite natural. Soon, as with airline credit cards, Starbucks fans will be able to earn free drinks and such by using Starbucks plastic, co-branded with Chase bank, at almost any store. How quickly the free lattes will pile up is still a mystery. The Starbucks card won't be a credit card, however — it will be a prepaid debit card. We'll get to why in a moment.

Wal-Mart's proposition to its 10 million or so cardholders is even simpler: Customers who shop at Walmart.com — using either the store's credit card or preloaded debit card — will get 3% cash back. They will also get 2% back on some gas purchases, and 1% back on everything else.

Now, what's in it for them? Well, in a generic sense, all retailers have to act more like banks nowadays, says Gartner payments analyst Avivah Litan. Payment processing is expensive, and big retailers are tired of sharing revenue with big banks.

"Paying more for payments eats into profits. The big chains have had this problem for years," she said. "The only way around it is to create payment mechanics that generate revenue."

While the two firms' aggressive plastic moves sound similar, they have very different motivations.

Again, Wal-Mart's story is simpler. The discount giant is making the move chiefly to maneuver in reaction to Costco, which is about to make a dramatic change in its credit card offering. For 16 years, Costco only accepted American Express credit cards in its stores. This summer, Costco shifts to Visa. It's also ramping the reward offering for its own Costco Visa card, promising consumers up to 4% cash back on gas and 3% on travel. So Wal-Mart is partly reacting to Costco's enticing offer with its own. At the same time, Wal-Mart is also making a jab at Amazon and other online retailers by heavily incentivizing Walmart.com purchases. Consumers who order online, but pick up at local stores, will still earn 3% cash back, giving regular Wal-Mart shoppers a huge incentive to plan ahead before their shopping trips. That also gives Wal-Mart critical data about their shoppers, and a logistical leg up for its supply chain.