They cant buy booze. Other than that I think they can buy anything meant for humans to eat.
Saw a woman tonight at the grocery buying two large boxes of TGIFriday frozen potato skins with her Ohio card (like food stamps but looks like a credit card so people don’t get stigmatized). Anyway, the other products she bought at the same time (Coke, batteries, etc.) weren’t covered under the card so she whipped out a 100 dollar bill to pay. I told my friend that I wish I could buy TGIFriday snacks, but we can’t afford them!