12. A system comprising: a processor; and a memory storing instructions that, when executed, cause the system to: receive data indicating an engagement action associated with a content item, the engagement action performed by a first user and the content item associated with a topic; determine a first topical reputation score related to the topic for the first user based on one or more other engagement actions associated with the content item; receive data describing a second management action performed by a second user on the content item, where the second user has abilities to curate content items associated with the topic, the second management action including one of an approval and a rejection to include the content item in the topic; determine a first set of impact scores for the second management action performed by the second user; and adjust the first topical reputation score for the first user based on the first set of impact scores.
12. A system comprising: a processor; and a memory storing instructions that, when executed, cause the system to: receive data indicating an engagement action associated with a content item, the engagement action performed by a first user and the content item associated with a topic; determine a first topical reputation score related to the topic for the first user based on one or more other engagement actions associated with the content item; receive data describing a second management action performed by a second user on the content item, where the second user has abilities to curate content items associated with the topic, the second management action including one of an approval and a rejection to include the content item in the topic; determine a first set of impact scores for the second management action performed by the second user; and adjust the first topical reputation score for the first user based on the first set of impact scores. 15. The system of claim 12 , wherein the second management action includes an acknowledgement of relevance between the content item and the topic.