Does anyone know what prompts the coupons to print from the catalina machine?

[lunapotter]

My SIL bought a bunch of stuff at PC the other night for a party. She got hamburgers, buns, hotdogs, sodas, etc. She didn't buy any non-food items but she still got 4 coupons from the catalina machine for $2 off tp, $2.50 off laundry detergent, $2 shampoo/conditioner, and $1.50 off frozen meals. I hardly ever get good catalinas like this so I was wondering if they print randomly or by the amount that is spent or something. Anyone know the answer to this question?

[queenofthehivemomof5]

Catalina coupons can be triggered by either items you just bought. For example if you bought one brand of laundry detergent, a coupon may spit out for a competitors brand to try to get you to give that brand a try next time. The OYNO Catalinas fall into this category as well.

Or if you are shopping at a store that has a store card, they use your card to track what you buy and Catalina coupons can print based on what you have purchased in the past. So for example you buy a lot of pet products in general, you go in to get a loaf of bread and toothpaste you may still find yourself with coupons for dog food or cat litter.

And sometimes it is just random...