Don't be surprised if they are selling btc out of these locked accounts and will buy back once btc drops considerably, replace them and then reopen your accounts.
I don't think they really need to lock that much accounts to do that. They could as easy just do so taking some BTC from own cold storage. I mean with 50 000 BTC daily volume they can afford (or think that they can) temporary insolvancy for 20-30 Millions. However I believe bittrex know better then trade-gambling with their customer funds, it feels kinda low. My image of those people tells me they never involve in something that bares financial risk. My gut tells me it's location-based ban - a perfect crime, since Bittrex is US company and explicitly forbidden from doin business in certain regions so they can block accounts, keep numbers in their databases, representing withdrawal limits, then ceise those funds in 2 years as they state in TOS.
Or, perhaps and hopefuly they will issue another statememnt, explaining the delay and unlocking accounts. God knows, but they surely aware of the issue, which means bittrex ignoring this subject intentionally.
