51 bitcoins were worth $6800 at the time of purchase, but since they would be worth some other amount when a refund became due, you get more or less btc on a pro rata basis. I'm sorry you are still clinging to an invalid interpretation, even though its been debunked.
There is a good reason no court in the US would ever agree with your interpretation. The reason is that you are a a stupid dumbass trying, but failing, to be cute.

The first board rev used a flawed design, but the chip works fine. You are not using the term 'design flaw' correctly.
This isn't hard. You can understand this.
Cara stated clearly in the e-mail. If product doesn't ship you get 51 bitcoins. She never mentioned anything about $6800 or exchange rate or dollar or fiat or anything. Now I don't know why that e-mail didn't held in court but if a company tells me that they will refund 51 bitcoins I expect 51 bitcoins. Note that the statement wasn't "full refund" or anything like that. It was pure 51 bitcoins with no mention whatsoever of the exchange rate.