1. A computer-implemented method, comprising: determining, using one or more processors, a first score for a first user based on a quantity of other users that subscribe to the first user so as to receive messages submitted by the first user; determining, using one or more processors, a second score for a second user based on a quantity of other users that subscribe to the second user so as to receive messages submitted by the second user; selecting a third user with which the first user and the second user interact; determining, using one or more processors, a third score for the third user, based on the first score for the first user and the second score for the second user; determining, using the third score for the third user, a score for third user content that was submitted by the third user; ranking the third user content with respect to other user content of other users based on the third score for the third user content and scores for the other user content; and providing the third user content and the other user content for display by a computing device in a ranked order according to the third score for the third user content and the scores for the other user content.