Speaker vibration isolation

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. 

I purchased these footers that go inbetween your speakers and your stands. They're from a Swedish manufacture, Sonic Design. You can purchase them here https://www.ebay.com/itm/Sonic-Design-Damping-Feet-for-Loudspeakers-HiFi-Equipment-50-100-Kg-Set-of-...

Apparently they work quite good, will report on results once I have them in place.

The Gaia I's were of great benefit to my speakers even on a cement slab floor. One note on the Gaia's is that they are directional and need to be properly oriented with the label either facing forward or backwards. Like many have already mentioned they come with a 30 day return policy, so they are well worth a try. I was prepared to send them back if they didn't provide a noticeable sonic improvement......they've never left my speakers. Lastly, I have my installed with the Sound o City outriggers which look great together and add more stability.