I would say if you haven't used some of the extreme high end tweaks like audiophile rocks, please don't judge them. After all, I remember the once thought snake oil products such as snake oil, bust cream and sea monkeys were thought to be somewhat suspect. Perhaps, like many people, I was to quick in judging these products without trying them.
What’s your vote for the most ridiculous, overpriced, and useless tweak?
My vote: Furutech Outlet Cover 105 NCF $220, with “special crystalline material that has two “active” properties.” https://www.thecableco.com/outlet-cover-105-ncf.html