The company may have just found a unique solution to revive growth in its core North America market.

People love their credit card rewards. Whether through the psychological impact of knowing you earned points on every swipe or the upscale perks these companies offer, premium cards have been a mainstay in popularity in the United States for years.

The king of premium credit cards is American Express . With its Gold and Platinum cards, the company has built a credit card spending ecosystem focused on travel, entertainment, and premium shopping.

Recently, American Express made a big refresh on its highest-fee Platinum card. A surprise cash back partner was announced as a perk for the new Platinum card: Lululemon ( LULU -0.71% ) . The struggling apparel retailer is offering huge

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