The Admin can set the percentage of each sale that can go to the author. This is very important because it gives the application a way to calculate earnings. There are two parameters to configure here:
Author's percentage from Organic Sales= this is the percentage that will be paid to the Author if the sales did not result from their own promotion. For instance, if someone bought the course using a coupon code generated by the admin in the backend (during site-wide promotions), or if the student bought the course at full price without any promo from the author, then this is the percentage that the author will receive from that sale.
Author's percentage from their promotions= This is the percentage that will be paid to the author if a sale was made from their promo code. Usually this percentage is higher (because it is the Author’s effort that brought the sale).