Merchant pays gold points (GP) to have their ads displayed. When users click on ads, the merchant's GP balance decreases. Merchants with higher GP balances will be ranked higher in search results. When users purchase items after clicking ads, the site earns a commission based on the sale amount as agreed with the merchant. Coupons are used to attract customers and boost sales, but have expiration dates. The site also earns revenue from user clicks on ads and links to other websites through a cost-per-click model.