It doesn't matter what your ToS said at the time of purchase, no one is going to be refunded 50-60 BTC. It's absurd to even wish that could happen. You're going to get $5600 (or whatever you paid in USD) back and that's it.
Where were you when they were claiming thats exactly what they'd do? I don't recall any posts from you on it then. I suppose you are not actually a HF customer and instead bought from their competition without these "absurd" claims, at 1/5th the price?
Why do you think it absurd? If they'd collected the coins and sat on them after all, they say their fabrication was paid for by investors not by spending preorder money then they could easily return them.
Or do you mean its absurd in that they're now sitting on millions of dollars of other people's coins which they obligated themselves to return but can plausibly escape doing so without consequence because of the cost of a legal fight and the possibility of them spending themselves into bankruptcy first, and so it would be "absurd" to honor their agreement? Is that what you mean?
I really feel for HF customers but I too don't understand why so many people actually think a BTC refund is even possible. Their claim that they would give full BTC refunds actually was one of the reasons I decided not to order from HF because it sounded scammy since there's simply no way they could guarantee it with BTC's volatility. Yes they offered it but the sad fact is that it simply is not possible so begging the issue is just a waste of time. Focus on getting USD refunds or higher hashrate IMO...