Earlier quoted context omitted.
Just did, check my comment above
I don't think that "(no idea what the margin is)" is what OP meant by running the numbers. Mostly a "pamper early adopters with VC money" operation I think, possibly with a profitability story (that may or may not turn out to be realistic) centered around high real estate value areas: in those places where the ground occupied by a gas pump and its accompanying infrastructure plays a significant role in the local fuel…
I think the real takeaway here is that even at ~$400 per 25 cars refueled, it's not a super great market to be in. It's also kind of like starting a printing company during the 21st century (cough cough Vista Print). Yes, there's a sliver of margin to be had with aggressive automation and negotiation but at the end of the day, you'll be out of business in a couple decades when the underlying technology changes, in this case electric cars that can be charged at home.