Speaker vibration isolation

I feel it’s only fair to interject that whilst cement slabs do have their advantages they are nevertheless subject to the very low frequency vibration produced by the motion of the Earth’s crust, which pushes the cement slab just a tad. That is why mass on spring isolation is effective on cement slabs.

So, if I am to understand the dialogue, Martin Logans currently spiked to suspended wooden floors should benefit by a decoupling agent like the Giai 2. Right?

Typo: Gaia 

I would image dipoles do not produce much downward force compared with box speakers, thus reducing or maybe eliminating feedback problems. Whether dipoles benefit from isolation themselves, color me skeptical.

Add me to the Gaia success story club.
I put Gaia 1 on my speakers and never took them out. They work really well. My speakers are not electrostatic, so not sure if my feedback would help you. I can also confirm that what is written above matches with my experience as well. Classic suspended wood floors benefit a lot from the type of isolation Gaia provides. Solid concrete slab - not so much, if there is any difference at all. 
Get the Gaias and try them. Most likely you would get very good results. You can return them at most places they sell them. Unlike cables and electronics, you don't need to wait for a burn-in period. You should hear the difference immediately. If you don't - return them.
BTW, I really like the Gaias on my speakers, but my curiosity made me order some Stillpoints 6 to try as well. It would be nice to compare them with the Gaia.