What’s your vote for the most ridiculous, overpriced, and useless tweak?

Your advice are precious like a denture to a very old princess indeed!

                            (o))
                       (  : 
                             (o) 

Fishing line is not an isolator. It is a connector. It connects ceiling with cables.

"...to a very old princess indeed!"

Isn't very old princess usually a queen? At least she is a "queen-loser".

If anyone is unconvinced that a fishing line is an isolator feel free to attach a rubber band to one end of the fishing line. Voila! If you’re still an unconvinced fuddy duddy, use bungee cords. 🤗 LIGO employs sapphire threads for isolation so there ain’t nothin wrong with using thread or fishing line for isolation. It’s a beginner mistake to think otherwise. Thread or line cannot physically support low frequency vibration. You don’t want to break any laws of science, do you?  

Most useless tweaks?

Or is this now an endless hijacking by the most useless tweak salesmen posing as posters?

Anyway, what about moving coil cartridges? When you consider how good moving magnets are nowadays, plus their technical superiority...