I still have a little doult about it.
When I short the bitusd, I promiss with double price for backup.
I think double price is the most I should be responsible.
the solution you point out take more from the shareholder, It's unfair.
I still prefer to force offer an buy order: sell the backup bts to buy full bitusd to cover the short position.
I have give all my backup, it's enough for me.
for this buy order, If it can match the sell order in the marketing , I don't care, it's the choice of the marketing.