I think it’s just a case of relabelling the Bussmann fuses and cryogenically treating them which destresses the fuse.
A while back my friend Bob was waxing lyrical about Audiophile fuses that he had bought from Russ Andrews. When Bob and his wife travelled overseas to visit their daughter, her husband and the grandkids - I was tasked with looking after his tropical fish, etc. Long-story short: I swapped out all of the fancy fuses on equipment that had fuses protecting either channel hence I replaced all the exotic fuses on the right channel with bog-standard fuses from RS Components, I left the exotic fuses in situ’ on the left channel.
When Bob returned home over a month later he had no idea that I had swapped out the exotic fuses, said fuses on the right channel; Bob was oblivious - completely in the dark, but he was still very happy with the sound of his system. It was some 6 months later on in the year at Christmas when I handed him back his fuses.
Now, I didn’t expect Bob to say you’ve changed the fuses - but surely if the superior, exalted fuses were as substantial an improvement as Bob proclaimed then to be, why didn’t he notice an imbalance to the sound and/or notice that something wasn’t quite right…! After a few profanities from Bob - we both had a great laugh, but I still rib him about it !!