Originally Posted by
powers2b
They use whatever brand sponsors their team and they get it for free from the manufacturer.
The manufacturer hopes that the fans will see what the pros use and rush out to buy their heavily marked up product at the nearest bike shop.
How often you clean and lube is infinitely more important than what you use.
Enjoy
First time in recent memory that I saw a sensible answer in a thread about chain lube.

Of course no one will get it, and this will go on forever about almost useless info, thinking the material is more important. I clean my chains often enough and correctly. Some people notice, they ask what lube I use, not how do I do it!!!

Then they have to have what I use.

I have given up trying to explain.