I remember the first time I saw audiophile cables that had an "electron flow direction" marked on them and I kinda knew right then what this was all about.
This company is also guilty of some silly cable marketing: https://www.audiodesign.co.uk/styled-26/styled-21/index.html
Even leads for monitoring brain activity don't do that stuff. And they are monitoring literally mV. Leads and contact patches are often made of silver to capture that stuff too, and they have actual reasons to use silver.