Tesco, Sainsbury's Make Millions Off Loyalty Card Data: Times - Bloomberg

Tesco Plc and J Sainsbury’s Plc, two of the biggest UK supermarkets, make about £300 million ($376 million) a year from selling information about their customers’ shopping preferences, the Times reported.

Britain's Sainsbury's offers lower prices to loyalty card holders

Retail Disruptors: The by Steenkamp, Jan-Benedict

Tesco lifts market share for first time in 5 years

Tesco Caps Tumultuous Year With Huge Loss - WSJ

The supermarkets' next big product is your data

Retail Disruptors: The by Steenkamp, Jan-Benedict

Markets not live, Wednesday 26th February 2020

Inflation Hits Loyalty Cards as Tesco, Sainsbury Ramp Up Promotions - Bloomberg

Supermarket loyalty cards 'not all they're cracked up to be', watchdog warns - North Wales Live

Inflation Hits Loyalty Cards as Tesco, Sainsbury Ramp Up Promotions - Bloomberg

Sainsbury's and Tesco make £300M from YOUR data in 'loyalty schemes'

Tesco and Sainsbury's providing 'misleading' loyalty card prices, says Which?