Is the Ginko Cloud 11 the best isolation for a VPI

No the cloud was built with the VPI products in mind. I wrote a longer bit recently on isolation. Look for it.

Wonder if this applies to turntables without suspension? I'm referring to Technics SP10, Garrard 301 and such.

I had a Lenco with heavy plinth sitting on a 2.5" butcher block shelf, attached to the uprights in my bookcase but still got foot fall feedback. I did not try the Ginko or other isolation devices beyond the usual cones and rubber footers.

I know of one person who has the cloud under a scout who is quite pleased with its performance. Another option is a sandbox. I use one under my ScoutMaster with good results. However it is a DIY project. FWIW, I also have the motor platform separated from the plinth platform. Harry Weisfeld of VPI thought that a very good idea when I told him of my plans.

Harry and Vin are not on the best of terms right now. So his comment should be taken in that context. Anyway look for A DIY isolation concept I wrote about a couple weeks ago.

Can you point me to that thread?

I am using the springs from the Promethean base. I highly recommend making the stand. Cost is about the same except for the shelves which you can purchase at home depot etc. I can jump next to my table while before I couldn't even walk lightly. That is on concrete floor.