@peemasons @DC5FAN @Paultron @s2208 IDK if it's universal but in shittier areas you'll see those "WIC eligible" stickers on shelving. That denotes something that the government card will pay for, because once upon a time they tried to make sure people would buy healthy, real food on the dole. That didn't last long, and now just about everything is on the table, (I recall coca cola lobbying for its drinks to be added to the list, for some reason. Basically subsidizes them)
Some places didn't want to deal with the crowd, or the labeling maybe so they just wouldn't take it? This is all hazy childhood memory of being in our hood, but I don't think you can just spend the food stamps money just anywhere, you have to find a participating retailer