The big supermarket chain around here gives customers a discount on gas--it varies from day to day--with purchase. It's usually around 10 cents a gallon or so. They also have coupons for local businesses on the back of their receipts, but they all have limits. The same chain also offers a deal to organizations that wish to sell gift cards to the store, which is really quite a good deal. For every $25 in gift cards sold, the store pays the organization $5. Since almost everyone needs food/gas, and people who buy the cards get exactly what they pay for (e.g. for a $100 gift card, you pay $100--there's no additional fee and you can buy in increments as low as $25), it's a good deal. You might as well pay an organization to which you belong or which you support the money you'd pay in groceries for the month anyway and then just use the card in the store, which can actually be hugely convenient if you're just running in to grab something from the deli (the store in question has several kinds of takeout food too).
I'm not sure that even using excessive numbers of coupons to make packages for charity is such a great idea, because it ends up forcing stores to limit coupon use and spoils the whole plan. It's probably better to approach stores for donations or discounts for the project.
I love a good deal--I'm wearing Isotoner slippers right now that I managed to get at over a ninety-percent markdown by combining a sale with an in-store coupon, but I didn't buy every pair of discounted slippers I could find. I bought the pair I could use. I will also sometimes buy hats, mittens, gloves etc. in assorted sizes toward the end of the season, when stores mark them way down to get rid of them, store them with my Christmas stuff, and then donate them to various charities that collect such things the following winter, but again, I don't overbuy. I might buy three or four sets, not fifty or sixty. I'm afraid if I cleaned out the whole shelf, someone who really needed a pair of mittens right then wouldn't be able to get them.
I guess I'd also like to know what the people who save all this money actually spend the money they save on. Do they need to be that frugal or is it just some kind of high to them to be able to say they outsmarted the store?