FunGuy2PlayWith on Nostr: It is to influence your purchase decision. By forcing you to look at the product and ...

It is to influence your purchase decision.
By forcing you to look at the product and connect you to the savings, you are more likely to purchase that brand of whatever in the future, even if the coupon is no longer valid. Bonus is that there is a chance you will impulse buy that product next time you are at the store because even though you might not need it immediately, it is discounted now and might not be when you actually need it.