The CFTC doesn't have that authority; a company can only get shut down for a criminal offense and Tether is not accused of any crime. Only the Department of Justice can prosecute or investigate crimes, the CFTC is an independent agency and as such has no authority to do so.
All the CFTC can do is levy a fine, so both parties are fairly indifferent as to whether that money comes from a judgement or from a settlement. There could be some minor benefit of not having to admit any "wrongdoing" for press release purposes, but overall it makes no difference.
All the CFTC can do is levy a fine, so both parties are fairly indifferent as to whether that money comes from a judgement or from a settlement. There could be some minor benefit of not having to admit any "wrongdoing" for press release purposes, but overall it makes no difference.