There has apparently been a hack of a Tether "treasury wallet", so as a safety measure BlockTrades is temporarily suspending trading in OPEN.USDT until we are sure that OpenLedger has upgraded their Tether wallet to the new version referenced in post below (excerpt reprinted here):
Tether Critical Announcement
Yesterday, we discovered that funds were improperly removed from the Tether treasury wallet through malicious >action by an external attacker. Tether integrators must take immediate action, as discussed below, to prevent >further ecosystem disruption.
$30,950,010 USDT was removed from the Tether Treasury wallet on November 19, 2017 and sent to an unauthorized >bitcoin address. As Tether is the issuer of the USDT managed asset, we will not redeem any of the stolen tokens, >and we are in the process of attempting token recovery to prevent them from entering the broader ecosystem. The >attacker is holding funds in the following address: 16tg2RJuEPtZooy18Wxn2me2RhUdC94N7r. If you receive any >USDT tokens from the above address, or from any downstream address that receives these tokens, do not accept >them, as they have been flagged and will not be redeemable by Tether for USD.
https://tether.to/tether-critical-announcement/
On a side note, we had recently run low on Steem for delegations, but more is now available:
NOTE: This is more of a public service announcement than anything else. BlockTrades has suffered no damage as a result of the hack of Tether's wallet.