If we look at Quora as a marketplace connecting users in need of information and experts, then paying for questions means oversupply of experts. This is a bad s

If we look at Quora as a marketplace connecting users in need of information and experts, then paying for questions means oversupply of experts. This is a bad sign: if a lot of people are ready to work for free, there is another incentive behind. I believe it is either marketing or vain. If so, it seems irrational to me to seek any kind of information anything on Quora.