The reason why I said it is a thing but that off the shelf products don't work is that, as any vibration consultant will tell you, vibration is resistant to simple or brute force intuitive solutions. It isn't your speakers vibrating, it is parts of your speakers vibrating at certain frequencies in a soup of other vibrations including your room modes, floor flexure, other things in the room, etc.
In my field when we need to create a vibration solution it is 1. Defined ('microscope is blurry' 'microtome isnt working') and 2. Engineered and tested.
It's not all always complex or even expensive. Sometimes it's a matter of moving equipment closer to a column where a building is stiffer. Sometimes it's a matter of a suspended air isolation platform. In any case it is tested and measured. Fortunately there is no Harman preference score for electron microscope imagery, I think they can actually measure it.
Maybe the pucks work, who knows, but their own marketing materials have purely subjective conclusions.
Basically the answer to the question is, there is no convincing data, and you might as well just experiment to see what works. Expensive stands also look cool, which is as good a reason as any to use them.
We all wish we knew but we don't know.
