"If Lavabit lost its appeal to the F.I.S.C.R., and still refused to coöperate, it would run a serious risk of being found in contempt; that’s how most courts punish those who disobey its orders. The FISA court is no different. According to the court’s rules of procedure, a party may be held in contempt for defying its orders. The secret court may consider many punishments—secret fines for each day of noncompliance, or even secret jail time for executives. The idea behind civil contempt is that “you hold the key to your own cell.” If you comply, the punishment stops. But hold out long enough and your contempt may be criminal, and your compliance will not end the jail sentence or displace the fine."

Any claims the FISA court is not a real court fail hard if the above is correct. Which is pretty much has to be for the current system to work.