its back. I dont think its an exit scam. They have good industry relations to bitcoin businesses and banks in Europe and US.
I also like their advanced security features (global settings lock). withdrawal bank transfers have also always been very fast (0-1 workdays). To me its obvious they simply on boarded too many new users and never upgraded their trading system, which was quite unstable right from the beginning. They obviously lack skilled coders.
Actually withdrawal transfers are listed as $500k per MONTH for tier 4, but when you actually go to withdraw any amount over $50k for the YEAR, they lock the transfer and take months to give you your money back and that is when they inform you the limits are $50k/year. You would think they would switch the limits advertised as $500k month on their site.