One of the benefits of this project to the sellers is they will get a 50% Ad profit share, which is good because even though you can't sold or all of your product are sold you will still receiving your benefits, and also the buyers will also benefits another 30% of Ad profit share if the product is being sold.
That would be great if the project becomes successful and well known, they will surely get many advertisers interested in putting their advertisements on the platform. It might become a small amount in case there are so many sellers who would participate and take part of the 50%.