... they had nothing to fear from the government as long as they followed U.S. financial rules.
^could be problematic for most, if not all, companies currently involved in bitcoin. First, it is super expensive. Second, who knows what those recent 20+ subpoenas will reveal. Would anyone be surprised if the regulatory bodies determine that no current bitcoin-related companies have adequate KYC and anti money laundering procedures in place?
KYC is not really that hard or expensive. There are service desks that will do it for you for a few bucks a customer. Perhaps it is the non-monetary costs that have been more daunting?