In one aspect, a method includes identifying a first user viewing a first set of posts at a social networking service, the first set of posts including one or more posts, determining that the level of engagement of the first user at the social networking service is below a predetermined level, generating a second set of posts in response to determining that the level of engagement of the first user at the social networking service is below a predetermined level, the second set of posts including one or more posts not previously seen by the user and providing the second set of posts for display to the user. Other aspects can be embodied in corresponding systems and apparatus, including computer program products.