Judge is a fool
The court(s) involved did not adequately scrutinize the evidence brought before the court.
The FBI is not in the business of repairing services for many companies, they are in the business of gathering evidence. Now the FBI owns a bunch of DNS servers that other people and companies are using, and were using because it did NOT belong to the feds, or because a bot changed their DNS without their knowledge.
Now, the FBI can monitor any connection that uses those DNS addresses, and do so without any additional warrant. Either the judge let them do that intentionally, in which case, that judge(s) are simply accessories to gangster like activities, including racketearing, collusion, and conspiracy, or the judge was a fool.