Even if they agreed with you, where was HF supposed to get the money to pay out 10x their orders, after spending millions to build an amazing chip and some less than amazing boards? It was a start-up, not IBM.
One would think that they would perform some sort of hedging, such as buying special situation insurance, futures, or options. That is what companies do that deal in multiple currencies, anyway. If they could not do this, they should not have made that promise.