(Image by Eddie Welker via CC BY 2.0 ) “Thank you for shopping here! Would you like to enroll in our shopper’s loyalty rewards program?” I am always puzzled when I hear this phrase after I pay my groceries at a supermarket counter. There was a time when I had a rewards card, loyalty program or shopper’s appreciation card from all of the major supermarkets. I believed I had to get one. What...

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