Toronto. Many companies last century offered deals on non-competing products to expand their market segment. An example was Marlboro cigarettes and Kodak (in the days before the link between cigarettes and lung cancer/heart disease was legally confirmed and tobacco products banned from advertising).
Any American for a few bits of cigarette packages could order a Kodak Brownie at a big discount. The tobacco company sells more cigarettes; Kodak moves more film burners for its non camera products; and everybody wins, cough, cough.
My thanks to fellow PHSC member George Dunbar for sending me this advertisement from page 29 on the June 15, 1962 issue of LIFE magazine. It was typical of the ads of the day promoting one product by offering another at a lower price via mail order and “proof of purchase”.