A reward system for response correctly.
Let the author pay when starting a new discussion. Let the payment appear on the post page. You can think of this as a reward for giving the discussion to someone who answered correctly. When an exemplary person answers the discussion or question correctly, he or she will earn this money. Or it will be divided among those who answered correctly (this is debatable).
When the correct answer is specified or we click on a button saying he is entitled to receive the money, the amount paid is recorded in the profile of the correct answerer. These amounts are calculated and paid to the authors by the manager on certain payment days.
A setting can be added for commission deduction from the admin section.
And the administrator or moderator should be able to edit the restructuring of the earnings. Example: When a user answers correctly, the amount paid is recorded in their account. However, if better answers come, the manager should be able to give these people a share of the prize. So that there is no injustice.