First of all "Polish" should be written with a capital letter.
Secondly Bitfinex has multiple bank account in multiple countries (what has already been proven) and this is just one of those accounts.
What is more any connection to drug dealing is highly doubtful as Polish government took some actions lately to block cryptocurrency trading and business in favour to banks and started an information campaign about (fake) connection of all cryptocurrencies with drug dealing. The reason of this seize is probably strictly political and has nothing to do with real drugs. This is just another government agenda to convince people that "crypto is bad" by both information flood and force (like in this example).