Do you use spikes for tile/marbel floor?

I have hard tile over concrete flooring, with the BBC MK-2 gold plated brass cones (available from May Audio Marketing) which come in nice boxed sets including the little saucer protectors for the floor. These have a nice low profile & even have threaded adjusters with locking nuts so you can snug them down tight even on somewhat uneven surfaces. They claim that the protecton saucers actually enhance coupling vs. degrading it. The cost is quite reasonable & the sonic improvement is indeed significant.
I've heard of coins being used as floor protectors but the spike eventually drills its way right through. Vibrapods have also been reported to work well under speakers although the sonic signature surely must be much different than with spikes; it might be worthwhile comparing.

Elb I never heard any objections to that approach; it makes sense to me. I believe that should work just fine; you're basically piercing the carpeting with the spikes & all the weight atop of them is bearing directly onto concrete.
I wonder who says that this won't work & what was the reasoning? I'd tend to disagree, although maybe I'm missing something?