My (big metropolitan) supermarket chain got rid of their loyalty card program. One explanation I've heard, is that so many people are purchasing with credit/de

My (big metropolitan) supermarket chain got rid of their loyalty card program. One explanation I've heard, is that so many people are purchasing with credit/debit cards, that most purchasers are readily identified and purchase history tracking continues unaffected. And if you purchase with a credit card, one way those businesses bolster their bottom lines is by selling your transaction history -- down to individual items purchased. It's enough to make one want to go back to cash...