Working in the banking industry, I can testify to measures are already in place to prevent laundering from any source that sends monies into the states, to a regular checking or savings account. Mindark was most likely just trying to get on board and be compliant to ensure they were not breaking any laws or opening up look holes. OFAC (google it! is just the first in many checks that are done long before your money is made available
As far as taxing goes, thats between you, your conscious and your lawyer
