Abstract: A system and a method includes determining, with a processor, for each of a plurality of processor-implemented content item sources, an output quality metric based on activity data related to actions accessed from an electronic data storage related to content items previously output by a respective content item source, determining, for each of the ranked lists, based on the output quality metric of the respective content item source, a number of content items of the ranked list eligible for output to a user device, and outputting content items for display on a user interface according to the eligible content items of the ranked lists. Each of the content item sources are configured to output a ranked list of content items stored in the electronic data storage according to a ranking schema different for each of the content item sources.

Abstract: Systems and methods for blending content items in a social network include identifying at least one content item type for each of a plurality of content items stored in an electronic data storage. A utility value is determined individually for each of the content items, based, at least in part, on an engagement value and a monetary value of each of the content items. The content items are ranked according to the utility values and blending concepts to obtain a ranking. The content items are displayed on a user interface according to the ranking.

Abstract: Systems and methods of ranking adjustment of federated content items in a social network include causing content items from a first content item source to be selectively displayed on a user interface, the content items form the first content item source being ranked according to a first ranking schema. Content items from a second content item source are displayed on the user interface based, at least in part, on a ranking according to a second ranking schema. Activity data related to interactions with the content items are obtained from the first content item source. A utility value adjustment to be applied to the first ranking schema is determined based on the activity data.