There was no breach of contract; HashFast either delivered the goods or issued (5% more than) full refunds to all Batch 1 customers.
Here's the contract.
The answer is if you buy Baby Jet for 51 BitCoins today and it does not ship, you will be refunded the 51 BitCoins you paid.
"Contract?"
Sorry, but that's just a post on an internet forum, not a contract. The ToS are binding, not statements made during an extended period of relative BTC/USD stability (just prior to an unpredictable and unprecedented explosion in BTC value).
Who was refunded 105% BTC? No one? That's the breach.
Not many customers took advantage of the full refund provision, but some did, and they have been paid (except for those windfall-seekers who returned the check and now tell lies about how HashFast sent them nothing).
If you refuse a more-than-full refund in legal tender (IE USD) there is no longer a breach to cure.