It`s the only exchange that have zero AML/KYC, there`s no way they can operate legally, even in Russia. If you have a legal case against you, you`re literally done. Thats how it works in this country. BTC China had a funding problems, not a fraud and money laundering legal case, you cant compare that.
They are even illegal under Bulgarian law I think, the law is more or less the same in continental Europe, here in Croatia you need to obey KYC to do any kind of financial meditation I think in Bulgaria is the same.