I'm sure that's the point. For a lot of people that is the only option. I have a Dollar General within a 2 minute drive while the actual grocery store is a 30 minute drive. If I didn't have a car I'd have no other choice.
I don't find the $tore is really that cheap. They have smaller sizes in most cases for food items. Prob better off at a big store and getting bulk frozen stuff.
This highlights part of the problem of how expensive it is to be poor. When youre living paycheck to paycheck, the thought of buying anything in bulk can be so daunting. Sure, you can get a months worth of food at Costco for $100, but when there's $50 left in your bank account, $30 at the dollar store will get you through until the next paycheck, then the cycle repeats...