Heavy Speakers with Spikes on a Concrete Floor

Looking through the current Mapleshade flyer, the flyer states that speakers sitting on a concrete floor will have boomy bass and treble that is muted.
Their suggestion is to buy their 4” thick Maple with 3” spikes platforms and place them under the speakers.

Now, forget for now the price of these platforms. Is their value to this claim?
If there is a value, I would think that instead of steel spikes, speaker manufactures would make a Maple speaker type footer. Wouldn’t that make more sense?

And secondly, how would I be able to place a 215 lb speaker with large spikes onto this platform?