I remember in the 70's when I was young my Mum and Dad smoked (shame on them) Players 'No.6'. In the packet was a coupon, 5 points in a packet of ten and 10 points in a packet of 20.
About twice a year a catalogue came out allowing you to redeem the coupons for household, garden, toys and other such things. I can recall one Christmas they decided to get my brother's and my presents from the catalogue centre. Armed with loads of coupons (coupons counted the night before) they made their choices, went to hand over the said amount, only to be told they were a hundred points down. My Dad contested this, but backed down when he was told that he had an old catalogue.
My parents' lungs must have looked like net curtains, the house was filled with smoke for the next week in a bid to get the extra points. They went back and got the prezzies, happy that they had got real bargains .That year I had fun opening my gifts in a haze of smoke and stench. Christmas dinner never tasted so yucky!