We had an explicit contract. The contract specified how this would be handled. This understanding was also directly confirmed with your staff.  Had Bitcoin went to $1 I would join with you in telling people under that contract who were looking for the USD price to stuff it.   My appreciation for your concern about buyers remorse is why I found the Dec 31st deadline acceptable in light of the Oct 20th advertised ship date— you didn't want the risk of people selectively canceling hardware based on how the recent price movements went.

There is no "windfall" involved here. You committed to specific terms, ones which were necessary at the prices your were charging to make your products commercially interesting. As your own founders had pointed out: You were selling a device to mine Bitcoin. If it mines less bitcoin then it costs then it is not a good buy. The construction of your contract was the only way to assure that your product wouldn't be a _massive_ loss for its buyers in the event that you failed to live up to your delivery promises, as you did. It was furthermore reasonable in light of your claims of using investor funds to finance your operation, as you could secure yourself against the risk while locking in the sales by simply setting the funds aside.

You still have not answered my questions— Do you or do you not intend to honor your clearly established contract with me with requires you to refund the Bitcoin paid?   You have still not responded to any of my certified letters.