SRA Silent Running Audio vs Critical Mass System

Lookee here, and here, you'll be glad you did.

I haven't done any comparisons to the two products you've mentioned other than pricing.

So i might uderstand this is VOODOO or snake oil

I cannot speak for Wellfed, but I'm pretty sure he did not mean that the products you mention are snake oil. He is just pointing out two more products, which will probably serve you just as well at much lesser cost. At least I would understand it that way.
I have ordered two SRA products for under my Atma MA2MkIIIs monos, as recommended by Ralph Karsten and he is certainly one of the good guys in the industry and I trust his word.

Wellfed is a renowned and esteemed poster here and I suspect his "recommendation" was tongue in cheek given the well known name of the company offering the amp spring stand.
Larry