Magnetic Footers

There are so many tweaks in the audiophile world that sometimes you just wonder is my music really improving with the tweaks.  I have added the Synergistic Blue Fuse to my Raven Amp and have pasted all the connectors and speaker cables.  I have upgraded power cords and cables.  Now it has been suggested to me that I should add magnetic footers to my Amp and Lumin X-1.  They range from $1,000 to $4,000 for a set of four which is not chump change.  They range in size from 3/4" to 1.5"'s tall.  Supposedly the taller the footer the better.  Is there that much better sound between the smaller ones and the larger ones?  

I am looking for feedback from people who own these to tell me their experience on sound and what they added to their musical experience if anything at all.  My 65lb Raven Amp sits on a solid quartz counter.  The two footers I was looking at were:

Alto Extremo New Flex Magnetic Absorber feet
Critical Mass System Center Stage Footers

Is it real or snake oil and why?