As for the premium, well don't you think gaz station take a profit
No, they don't. They make a few pennies per gallon, and if that's all a gas station sold, it would go out of business within a month. The real money is in the convenience store. They sell snacks, drinks, cigarettes, etc., at a huge markup. The gas is just there to get people to stop. That's also why all these gas station are putting up those obnoxious screens on the pumps, which play videos highlighting their "delicious snacks, and refreshing drinks." It's all about the up-sell.
Exclusive, low price items for a membership fee? If I were Costco I'd be nervous...
Low price items? There's a reason we call it the "$200 store" around here. You spend at least that much every time you shop there.
Except that many parts of the grid heat up during peak hours, and the engineers who designed it did so with a dependency on low power consumption at night, which would allow them to cool down. If you have a bunch of cars in an area charging at night, there won't be enough time for the transformers (etc.) to cool off before companies open shop in the morning and start heating those components up even more. Then one day, BOOM!
It's not just peak performance of the grid that matters, it's the minimum, peak, mean, and average.
"May your future be limited only by your dreams." -- Christa McAuliffe