I fondly remember Green Stamps, Red Stamps, and even Blue Stamps from when I was a little kid in the 60s.
Back in the days when "saving up for something" was the norm, and people weren't in debt up to their eyeballs. It was always fun to save up for something; when you got it, it was more of a special occasion. Instant gratification makes everything seem bland. In fact, that may have something to do with the "bland trend" in modern appliances...?