Absolutely. When I do my grocery shopping, I occasionally think about how I could get a better deal on something at Costco, but I either don’t have the space or wouldn’t eat it fast enough.
The “they’re paying more per-unit because they’re buying smaller packages” crowd seems to realize this, but they think that the size packages they buy are the correct size, and anybody buying something smaller is being exploited.
Not really. I use dollar stores for junk stuff. I'll finish a bag of Oreos in a day, regardless of how much stuff is in it. If it's cheaper and smaller proportionally, whatever.