Do you have an example? I am pretty sure that a FOSS license which requires companies to pay is impossible.

Open Source guarantees that anyone can give the software to a company for free:

“The license shall not restrict any party from selling or giving away the software as a component of an aggregate software distribution containing programs from several different sources. The license shall not require a royalty or other fee for such sale.”

And it guarantees that the company can then use it freely:

“The license must not restrict anyone from making use of the program in a specific field of endeavor. For example, it may not restrict the program from being used in a business […]”

Quotes from the Open Source Definition.

None. Those things are incompatible with each other.

Never read something more wrong about the subject. I sounds like you don’t actually know what Free Software refers to, and that it has nothing to do with the price.

Short and not completely true answer: Free Software and Open Source are the same thing, just with different reasoning behind them. Hence “FOSS” and “FLOSS” are also used, which combine both terms.