Can anyone explain cable risers?

""They do nothing except seperate you from your money. It's called wealth transfer""

Funny MY cable risers are empty toilet paper rolls.
Cut in half, then a "V" on both sides. Work great.
They cost me nothing. Since they are trash once the paper is used. And i actually am recycling them.
For the hoity toity, they can cut up paper towel rolls and cover then with white paper to look really fancy.. Though that would cost money for a few sheets of paper and some glue or tape.

"Funny MY cable risers are empty toilet paper rolls."

Elizabeth, you are a Paragon of practicality. You can even make nonsense sound sensible.
Cheers

"You can bet your bottom dollar that NONE of the various recording/mixing/mastering facilities are suspending their cables during the making of a recording."

I like that answer. All the recording studios I've worked in had the cables bundled together running across the floor or up inside a drop-ceiling. (We did keep power cables away from audio).
But I would agree with the theory to keep cables off the carpet.

Use gold coins below your cables and you will hear the improvement
immediately. Gold gets in reaction with the electrical field of the cables
and improves the molecular flow (more shiny). Some say, the best are
Krugerrands from South Africa ... but after long research I finally settled
with white-gold Rolexes below my cables. There is a swiss precision
added to details which is unique ...

Nonoise,
I agree with your statement concerning the effect of synthetic carpet. When my cables are lifted off that surface there`s an improvement in clarity,or as you say less smearing. The change is subtle but consistent.I can`t comment on other flooring materials.
Regards,