Advice on....Snake Oil

So the explanation that no suit has been filed over hi-fi fraud because it would be difficult to prove just isn’t valid.

Look we have the Inet now, Folks can google images of whatever they are considering buying. 
If they fail in their research, the blame lies with their laziness.
Rule #1, never ever believe what you read, w/o doing due diligence, = sniffing out the lies/propaganda.  Likea   good old hound dog.
Rule #2, never be too quick  to buy anything, always sleep on it
Observe these 2 basic rules, a  audiophile will be OK. 

NOTE I've seen  comments posted about a  certain coupling cap *The rave*, very exp vs others,, I know there is some snakeoil mixed in with the hype. 
But I keep my mouth shut.
I know  the lab I can trust, and so that case is closed

The three brands you cite are hardly the most snake-oily.

When a company "diversifies" into these more, errr, marginal products, it's probably because they feel they're just about achieved saturation in their segment of whatever market they're in.

Business 102.

If lawsuits against snake oil products were effective you couldn't buy homeopathy psuedo medicine at the store. Lawsuits against the type of deceptive practices employed by by some of these marketers isn't worth the time or effort. It is very hard to prove and claiming since noone has sued them they must therefore work is fallacy. 

Of all the cable websites I've read I can't recall ever seeing them claim that their cables will definitely make your systems sound improved. I only read that stuff here and in reviews. They claim some wild stuff and offer nonsense reasons but as long as they stay away from making definitive statements of guaranteed success then they have CTA. 

I think few engineers/markets set out to oil snakes.  They start off with good intentions and produce products that deliver on those intentions.  None of the three brands mentioned would be even close to the top of the list of brands I would consider snake oil peddlers.  

There are some products out there that just make you shake your head.  I can't imagine what causes people to buy some of the weird "tweaks" out there that they swear delivers better sound but are mind boggling. 

This is not a thread about the most absurd tweak, but there are some truly absurd things in the market.