I dunno, an amp must still perform its fundamental duty which is to amplify a signal. Snake oil is more selling a product based on claims it will achieve something that it cannot do. What you describe is just marketing spin in my opinion (maybe it's the same, but in my mind there's somewhat of a distinction).True but you are very well aware of what you are doing and why.
Rolex doesnt claim selling anything other than jewelry. They dont market it as "never miss your appointment with rolex , you will be so on time."
The fact that measuring time is very easy these days is commonly well known and accepted.
With amps it is different. Theres the common opinion that your A/B or A soundsva lot better - I believed it myself when I got here a few weeks ago.
And these amp dealers play into that misconception when they most likely know the truth. The snakeyness is not that it wouldnt be fair to spemd extra for a cool amp it is the promise of the extra "warm and musical" sound that makes uninformed people open their wallet.
But I think we're splitting hairs here. I just wanted to answer the question why people buy into somehwat obsolete technology, and why not everyone is just buying a $200 class D amp.