The replies in this thread are surprising.
For example, the price of 16 oz of bacon around here can range from 1,99$ to 7,49$ depending on the brand/week/store.
If it's on sale in one store, you buy 3-4 packages and put them in the freezer. You saved 7-15$ for a few weeks of bacon. That's one item for one month. Extend that for a few other items for a year and it's hundreds of dollars, possibly thousands if you have a big family. Even with a good salary, what's the point of wasting that money? It takes like 15 minutes to go through the flyers once a week so it's not like it's gonna stop you from learning French or reading War and Peace.
People are lazy and stupid and then complain about not having enough money for a Nintendo Switch or vacation. It's also something that you dont learn in school how shops take the money out of your pockets with these tricks or rather how they rely on these people.