I think it was Coconut Audio that used to sell footers shaped like various animals.Each set of footers were claimed to enhance your system in special mysterious ways.Funny stuff:)That site offered many bizarre items.
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