How supermarkets turned loyalty cards into a data treasure trove Loyalty cards were once a way to reward repeat customers, but the data they produce is now a lucrative revenue source for supermarkets Supermarkets • 16 Dec 24
How supermarkets turned loyalty cards into a data treasure trove Loyalty cards were once a way to reward repeat customers, but the data they produce is now a lucrative revenue source for supermarkets Supermarkets • 16 Dec 24
