The Albert Heijn supermarket group is to use information gathered through its bonuskaart loyalty card system to make personalised offers to shoppers,

Registered card users will receive specially-tailored offers every four weeks which reflect their current purchase patterns or which Albert Heijn considers might ‘meet their wishes’, the company said in a statement.
Discounts will be given automatically when registered shoppers present their cards at the supermarket check-out.
According to the AD, the company does not expect privacy to be an issue because people who don’t want to be included can swap their name cards for an anonymous one.