Oh yes?
"If you put something into a basket with an online shop without completing the purchase and then walk into retail branch they will spot that you are the same customer"
and exactly why do they think this is a good thing? And why on earth would the customer (you and me) think this is a good thing?
Sales assistant (in loud voice): "Ah, good afternoon Mother Theresa, welcome to Boots, would you like to pick up that bulk pack of pregnancy testing kits you put in your online basket yesterday?"