6. One or more non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause performance of operations that comprise: determining, using one or more processors, a first score for a first user based on interactions by other users with messages of the first user, or a quantity of other users that subscribe to messages of the first user; determining, using one or more processors, a second score for a second user based on interactions by other users with messages of the second user, or a quantity of other users that subscribe to messages of the second user; selecting a third user to which the first user and the second user subscribe; 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; using the third score for the third user in a determination of a score for a particular message of the third user; ranking the particular message of the third user with respect to other messages of other users based on the score for the particular message and scores for the other messages; and providing the particular message and the other messages for display by a computing device in a ranked order according to the score for the particular message and the scores for the other messages.
6. One or more non-transitory computer-readable medium storing instructions that, when executed by one or more processors, cause performance of operations that comprise: determining, using one or more processors, a first score for a first user based on interactions by other users with messages of the first user, or a quantity of other users that subscribe to messages of the first user; determining, using one or more processors, a second score for a second user based on interactions by other users with messages of the second user, or a quantity of other users that subscribe to messages of the second user; selecting a third user to which the first user and the second user subscribe; 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; using the third score for the third user in a determination of a score for a particular message of the third user; ranking the particular message of the third user with respect to other messages of other users based on the score for the particular message and scores for the other messages; and providing the particular message and the other messages for display by a computing device in a ranked order according to the score for the particular message and the scores for the other messages. 8. The one or more non-transitory computer-readable medium of claim 6 , wherein: determining the first score for the first user is based on a quantity of comments that other users have submitted as replies to the messages of the first user, and determining the second score for the second user is based on a quantity of comments that other users have submitted as replies to the messages of the second user.