There's just one detail: those 2 high-volume customers are buying my lemonade and re-selling them at a loss for $1 at another neighbourhood. Supposedly some high-profile Japanese bank is financing their lemonade purchasing expenses for eye-wateringly high interest rates. I've heard its well into the double digits. But that's not important, because the future is right around the corner - I can feel it - and in the future everyone wants lemonade. Thousands of litres of it. So even if those two customers go away, things will be fine!
It will all work out in the end. This is a totally sustainable business model. In fact I'm even thinking of going public.
In an alternative world where Walmart is selling it for $10 and I'm buying it from the reseller for $2, that's not the case.
Many people have been saying the second thing is happening.