"cheese nips" news and stories

OK, I get the concept: you get to have your favorite snacks (Chips Ahoy cookies, Cheese Nips, etc) and only eat 100 calories worth, so you can fit it into your diet. OK, so far, so good. But the packaging is what I don't get.

Each box comes with 6 bags of snacks, each one 100 calories. So what's to stop a person from eating 2 or 3 or 4 bags at one sitting, or in one day? I mean, if you're getting a bunch of Chips Anoy chocolate chip cookies, why not just buy a huge bag, the regular bag, and just eat 100 calories worth? (I haven't checked the math, but I bet that the regular bag of Chips Ahoy is cheaper than these snack packs). If you have the will power, great, but how do these help you with that will power? 

This reminds me of people who set their watches/clocks ahead 10 minutes so they won't be late. What? You don't remember that the watch is 10 minutes ahead? I mean, what's up with that?