I don't get it

To get feedback on user experience, would you rather not check with folks who currently own these speakers you mention?
As such speakers on carpet are not stable, and I am not discussing about sonic here. They might fall at the slightest accidental bump someone gives. The least you can do is - go to Lowes/HomeDepot and get a big tile (probably $4-$8 a piece) and place them underneath the speakers. Maybe the rubber feet will make more sense then? Did you get any other type of footers with the speakers?

Milpai, I'm reading anything and everything I can re various footers. I've also been reading the threads here. So yes, I am interested in user experience. The speakers did not come with anything else. I contacted the manufacturer for
any input, thinking that perhaps they've tried various products under their speakers. The 'don't use anything' response came as somewhat of a shock. I'm not asking about footers per se but rather wondering why a speaker maker would say such a thing. It makes no sense. Perhaps it will remain a mystery.

Desingers, no matter how talented, can be of a certain mindset and nothing will sway their beliefs. Like Milpai said, try a nice sized section of tile or wood to rest the speaker when upon the carpet. It could very well be that the designer tried all manner of footings and found the best solution (doing all the homework for you).

By the way, unless you have the proper depth and know what you're doing, I wouldn't drill into the bottom of any speaker.

All the best,
Nonoise