2. The computer-implemented method of claim 1 , wherein selecting the third user with which the first user and the second user interact includes identifying that: (i) the first user subscribed to the third user so as to receive messages submitted by the third user, and (ii) the second user subscribed to the third user so as to receive messages submitted by the third user.
2. The computer-implemented method of claim 1 , wherein selecting the third user with which the first user and the second user interact includes identifying that: (i) the first user subscribed to the third user so as to receive messages submitted by the third user, and (ii) the second user subscribed to the third user so as to receive messages submitted by the third user. 3. The computer-implemented method of claim 2 , wherein selecting the third user with which the first user and the second user interact includes identifying that: (i) the third user subscribed to the first user so as to receive messages submitted by the first user, and (ii) the third user subscribed to the second user so as to receive messages submitted by the second user.