Methods and systems for enabling multi-merchant coupon campaigns within an online publication system are described. In an example, a method can include generating an item listing, receiving information specifying a set of coupon criteria, detecting an event within a multi-merchant publication system, and present a coupon in response to detecting the event. The generating an item listing can be based on information received from a merchant-computer. If the set of coupon criteria is detected it can result in presenting a coupon for the item listing. The event can satisfy a particular coupon criteria from the set of coupon criteria.