"Samourai earned fees, therefore they were a business and how they wound up on the wrong end of a conspiracy to operate an unlicensed money transmitting business, right?"
The truth may surprise you, Samourai could have operated for free & they would have still been prosecuted.
https://blossom.primal.net/893945f8e4b8346aabfba2f4530988ed1ea1670d53e7035882c5314c6bd2a4e1.mp4