1. A method comprising: receiving, by at least one computing device from an access device, a request for a content instance included in a plurality of stored content instances associated with a plurality of user profiles, the request associated with a user profile included in the plurality of user profiles; identifying, by the at least one computing device based on a predefined relationship heuristic, a plurality of other content instances included in the plurality of stored content instances as being related to the requested content instance, the plurality of other content instances associated with other user profiles included in the plurality of user profiles; determining, by the at least one computing device based on a predefined relevance heuristic, a relevance between the user profile and each of the other user profiles; prioritizing, by the at least one computing device based on the determined relevance between the user profile and each of the other user profiles, the other content instances relative to one another; and providing, by the at least one computing device to the access device in response to the request, data representative of the requested content instance and the prioritized other content instances; wherein the predefined relevance heuristic is custom defined by a user associated with the user profile.
1. A method comprising: receiving, by at least one computing device from an access device, a request for a content instance included in a plurality of stored content instances associated with a plurality of user profiles, the request associated with a user profile included in the plurality of user profiles; identifying, by the at least one computing device based on a predefined relationship heuristic, a plurality of other content instances included in the plurality of stored content instances as being related to the requested content instance, the plurality of other content instances associated with other user profiles included in the plurality of user profiles; determining, by the at least one computing device based on a predefined relevance heuristic, a relevance between the user profile and each of the other user profiles; prioritizing, by the at least one computing device based on the determined relevance between the user profile and each of the other user profiles, the other content instances relative to one another; and providing, by the at least one computing device to the access device in response to the request, data representative of the requested content instance and the prioritized other content instances; wherein the predefined relevance heuristic is custom defined by a user associated with the user profile. 11. The method of claim 1 , embodied as computer-executable instructions on at least one non-transitory computer-readable medium.