I always fuel the bike seated on it with the bike level then it came to me if i fuel on the side stand that could mean possibly 1/2 galon more then i usually pack in it.
Seems like a lot of extra work to save on an extra 1/2 gallon going into your tank. Attempting to keep the cost of a fill up down? The way I picture this is you pull up to pump, put the stand down, climb off and go pre pay or dig out the wallet and credit card do all the functions at the pump, climb back on the bike and pump. I'm guessing if you paid by credit card you could reach over and hang the hose back and drive off. But if you have change coming its back off the bike again for the trip to the cashier.
That negative 1/2 gallon also cuts into how far you can get before your pushing that ride.... WHY???