Cryo Treating Silver Cables?

HiFi Tuning has had great success with cryo treated fuses made of pure silver.

I have two cryo treated silver cables -- one USB, one phono pair -- and I think they are very good-sounding. I can't say anything about the purity of the USB cable, made by Audiogoner Acreyes, but the phono cable, from Audio Sensibility in Toronto, is OCC silver FWIW.

Zmanastronomy: It might be more accurate to say that
HiFi Tuning has had great success MARKETING cryo treated fuses made of pure silver.

Acme cryo'd silver fuse holders and cryo'd silver plated wall outlets have been around for a very long time. No mystery here.

Should I cryo the metal plate in my head, even though it is not silver? Any Ideas?