There is no evidence that the US-arrested platform BTC-e is related to Bulgaria

The indictment (see here) states that the BTC has transferred resources worth nearly $ 4 billion, and a significant portion of that money is related to criminal activity. The company that offers exchange services between different crypto-currencies and traded in traditional currencies (dollars and rubles) has been represented as registered in Bulgaria but governed by Cypros legislation. Such data also appear in Bloomberg's authoritative business directory, referring to the information on the platform's web page.
Verification found that at any time the btc-e.com site was not registered to the name of a company or person affiliated with Bulgaria, nor was it hosted on servers in the country. The site was initially registered in Simferopol in 2011 by a Ukrainian and administered by a Russian who are likely to be faced
According to Wikipedia, the BTC-e platform is owned by the British company Always Efficient LLP. It is controlled by the Russian Alexander Bujanov, and the previous owner (until July 2016) is the Ukrainian Andrei Schwetz. Persons with such names are among property owners in Bulgaria, but not among owners or managers of companies doing business.
Also, a person named Alexander Vinnik does not have any business or property in the country, and the Canton Business Administration, a registered company of the Seychelles, is not the owner or manager of Bulgarian assets ascertained by a check in the Bulgarian Commercial Register