The way I see it, Terrahash customers have a variety of options... (please excuse my awkward presentation, it was the best I could come up with for organizing my thoughts)
1. Try to get a refund.
a. Not clear on if this is possible. It has been alluded to, but did not see any details.
b. CC dispute if paid through PP? Not sure how willing CC will be after 50+ days after sale.
c. PP says no, but I did see another thread that claimed it was possible but took a month.
d. BTC/money order refund not likely unless TH voluntarily refunds. This is unclear to me as they did say they would offer a refund once we get an email with an estimated delivery date. Did we get that email? Is the estimate two weeks after we get the chips? So does that mean that they will no longer offer refunds? Confused.
I can't really help you with your other questions, as you indicated, much of that is personal choice, and depends on your overall goals. Reselling is probably the best option for the biggest ROI.
In terms of refunds though, if you paid via Paypal, you do indeed have one option left to you, assuming your credit card used is like most.. You can file a dispute with your CC for non-delivery (Be aware, you only have 90 days usually, but it could differ). Again, this should stir up the pro-Terrahash folks (I'm not anti-Terrahash, In fact quite the opposite, but I just have an issue with people defending them on this refund issue), but frankly, if you offer refunds, then pull the wording right before the pre-orders, then post that they will be considered, and then finally post that they won't be honored, you don't have any leg to stand on, not even looking at consumer protection laws. Besides, while this is the Crypto world and the game is different, credit card companies don't see this any different.
When I pre-order a next gen TV from Best buy, and it is not delivered by the time that I would like, I'm going to ask for a refund, and if not granted, I'll get the refund through a dispute. Mitigated risk. These are not customized devices, they ordered parts based on the number of orders, and can easily resell them, especially if they answered their support tickets for authorizing change of ownership.