My mainstream supermarket in Nordics has for the longest time given individual coupons in their loyalty program.

There are three tiers of discount. There are general special offers, advertised widely, to get people through the door. Then there are members only discounts, advertised in store, to get people to be members. Then there are mailed to members personal discounts that are uncannily accurate for what is running out to get you to go shopping now instead of later. These days the hand scanners and apps also tell you what coupons you have so you don’t need mail but junk mail is still regular.

TBH as a shopper it works great.