If I had a question that was serious enough that I needed to pay to get the answer, then I would go to see an expert in that field in person, face to face. It would have/need to be a person who has a good reputation in that field. The last place I would go to have that sort of question answered is the internet, either by paying or not . You have no way of knowing that the person who is answering is who they say they are, and has the qualifications.
If it is a fun question, thought provoking, opinion, trivia etc, then there is no need to pay for the answer. If I didn’t get an answer to a question like that, well, it isn’t going to send me running to my corner, curled up in the fetal position!!!