You are a Yahoo! Merchant Solutions customer if you recently signed up for a Yahoo! Merchant Solutions plan or if you have upgraded your Yahoo! Store service to a Yahoo! Merchant Solutions plan. In order for Yahoo! Merchant Solutions customers to receive the 20% discount off of the default minimum bids (Default minimums are the published bids that have replaced the rate card), they MUST sign up through the Yahoo! Shopping, they MUST sign up through the " Yahoo! Shopping" link in their Yahoo! Store Manager.
Please note: Merchants who have a minimum bid below the default receive no advantage in ranking. Their minimum only allows them to have a product appear in Yahoo! Shopping at a lower amount. If they actually bid below the default minimum, their lower bid will cause them to rank lower than merchants bidding the default minimum, all other ranking factors being equal.