The days are over when the guy in the uniform filled your tank, wiped your windshield and checked your oil, water and air. The only way to survive today is to pump a lot of gas and either own a convenience store or a garage that can bring in extra revenue.
There's no economic motive. The point is to capture, and share, fantastic, fleeting moments.
On top of taxes and operating costs, you're hit with charges from credit card companies that might be 2 or 3 percent per purchase. That can hurt, especially if you're not sure how much more you're going to pay the next day.