Depends on country maybe? In Germany they make more by being small supermarkets, selling snacks, energy drinks, tobacco/vapes, alcohol, at insane prices, 24/7.

Depends on country maybe? In Germany they make more by being small supermarkets, selling snacks, energy drinks, tobacco/vapes, alcohol, at insane prices, 24/7. In the USA similar, with even wider range of stuff, except alcohol, though that may depend on the state, or even county also.