There's a few things a lot of people don't realize or understand about Extreme Couponing.
1. The whole thing was staged. That girl only bought 67 bottles of Maalox because it increased her total, and the coupons for $5 off brought it down that much lower, making it seem that much more "extreme." It was the same girl who had to call friends to be able to get $10 off her $50 purchase. The $50 was pre-coupon, so if the Maalox was $5.50 each, buying 8 would be $44. She'd need another $6 worth of stuff to get up to $50 to get the $10 off. So between using 8 $5 Maalox coupons and the $10 off from the store promotion, she'd basically be able to get $10 of stuff she *needed* for free. (Which she probably does on her regular shopping trips, to get stuff like her fresh produce and meats. But for the cameras, she got extra cheap/free stuff with coupons to bring her subtotal up super high just so that it would come down super low and seem very "extreme.")
Same thing as to why the twins bought every package of dental floss- it was on sale for $1 and they had $1 coupons, making it free. But if they got 100 packages of floss, making their subtotal $100, then after coupons it was just sales tax, wow, that's extreme! The twins buying 20 pork roasts for $1 each, totaling $20, doesn't sound as exciting as the narrator saying that their total was originally $120 and they got it down to $20 after coupons. (Or even $40 before the store card on just the pork roasts doesn't sound as "extreme" as a subtotal of $180 before the store card and $20 after.)
The producers told the couponers to come up with the most ridiculous, most extreme couponing shopping trip they could come up with.
2. There are some "extreme couponers" who buy in large quantities to resell. Not trying to start an ethical debate here. (I can see where some are coming from. Using the Maalox example from above, someone would be able to stretch their grocery budget by getting 8 Maaloxes and $10 worth of fresh produce, milk, meats, etc for free, and then turn around and sell it at their garage sale, a flea market, etc to help make ends meet. Yes, it could be donated, but if someone is unemployed/underemployed, adding 8 bottles of Maalox at $3 apiece to the table of garage sale stuff could net enough money for half a tank of gas. Or to be put towards groceries. The couponer gets "free" money, and the buyer gets a product they would buy anyway at the grocery store for about half price.) On another deal site, one of the veteran posters said that one of the guys on Extreme Couponing made something like $12,000 from a recent garage sale. Its an unconfirmed rumor, but it wouldn't surprise me, considering what his stockpile looks like. For some people, couponing *is* their job because of how much they make in the resale of these items.
I'm not to make all couponers look bad, as many do donate their excess, whether to charity or give it away to family and friends. Just trying to give another explanation for buying large quantities.
Keep an eye on the drugstore ads. In the last year, I have gotten various homeopathic remedies really cheap or free after the drugstore rewards programs. Mostly products by Boiron, like Oscillo, Cold Calm, Arnicare cream, and Chestal. I've also gotten free Hyland's products too.