I can't see other way than entirely forbid drugstores from having loyalty/rewards programs based on personal identification. They would be allowed to ask for y

I can't see other way than entirely forbid drugstores from having loyalty/rewards programs based on personal identification. They would be allowed to ask for your information when buying through app/web, but could never give you discounts or incentives of any sort for buying through such platforms. And that wouldn't mean they couldn't have a loyalty program: they could give customers stamps on paper cards, paper seals and alikes. It may sound archaic, but some big supermarket chains use this method regularly and it works pretty well.