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.
Bidium is decentralized an exchange Already blockchain, Media stored on the blockchain, bidium can transact peer to peer, Auction and freelance will have a store of data.