Issue: Card Sales?

Can we get the card sales back again? If not, what does everyone think about the option to allow submitters to promote their cards through card sales? For example, a submitter submitted X card in ishop and requested the card X to be sold at 20% discount for 15 days. The loss of revenue for providing the discount should be borne by submitter as a special payment for promoting the card. This will help members to buy cards at lower prices and submitters to promote sales of their cards.