Official Response from Bittrex Re- Ninja Market
Bill (Bittrex)
Jun 22 13:09
Hi,
Updating the wallet destroys millions of coins that people legitimately mined and bought. If the developer comes up with a fair way to reimburse those people for his mistake, we'll be happy to update to the latest fork and reopen the Ninja market.
Thanks,
Bill
"Updating the wallet destroys millions of coins that people legitimately mined and bought" - That was the reason to don't change fork, and that's only about "bad coins". And now they destroy them all (from good and bad fork)

Something stinking here..