Grocery stores can sell client data to their suppliers and use it to negotiate with suppliers. They also monetize it by sending you (supposedly) well-timed coup

Grocery stores can sell client data to their suppliers and use it to negotiate with suppliers. They also monetize it by sending you (supposedly) well-timed coupons. this is a huge money stream, and for retail they don't have many other options-- amazon and online delivery is eating their lunch.