The real reason shops want you to sign up for e-receipts

Retailers are switching to proof of purchase in digital form - allowing them to track trending products, buying history and even customer movements For decades, the high street has remained a refuge for digital refuseniks. Sure, you're now able to 1-click a multipack of quilted two-ply from the comfort of your loo seat using an Andrex Amazon Dash button. But, offline, in an actual shop, you hand over the money and you're done. Receipt in the bag? Yes, please. Related: Amazon launches Dash instan...