If I won a judgement against you and you didn't pay the judgement, I would use the legal system to enforce the judgement against you and gain control of whatever property you had that could be sold to satisfy my judgement.

So in this case, "seized by the US marshall" means just that... the US marshall took the property, most likely because somebody (Titan) got a judgement against the owner of the domain names and those were the only assets available to satisfy the judgements.

You can bet your ass that if it was a 2257 seizure, the Feds would be issuing press releases all over Creation to make sure that the Christian right knew that they were doing something to protect their phony-baloney jobs.