It hasn't been that many years since they quit green stamps in small town america.
I do remember my grandma being happy as a clam when she got enough stamps for simple tuppware mixing bowls.
That plastic glass Uncle Sigh drinks tea out of on Duck whatever? That is a tuppaware glass likely bought with green stamps back in the day.
My mom did green stamps.
I don't remember there being any store to redeem them.
A display was set up at the front of grocery stores and items displayed on it and a printed flyer provided to entice shoppers.
Items chosen were selected then in 4-6 weeks the item or items came in on the truck.
I was happy sending in upcs for sea horses back then or a real score, a cheap swiss army type knife out of outdoor life magazine.
Hard telling what all that glue did to kids in those days.
Probably spawned the 60s leftist movements and LSD development.