Never considered if any of the more regular posters here are paid for posting here. Very much doubt it.
Who do could be paying them? Guessing they are here for their own interest and satisfaction, as i am.
I agree wholeheartedly that the posters you allude to as well as the ones you name, in the main, post material well worth consideration and thought.
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”