Systems for curating and presenting relevant collaboration activity to newly-added users in a cloud-based content management platform. A method embodiment commences by observing and recording user events that correspond to interactions between any number of users and any number of content objects. When a new person who does not have an event history is added, his/her user profile is updated to indicate he/she is a new user, and a start-up proxy user is identified. The proxy user refers to either a real user that is in some way similar to the newly-added user, or the proxy user is a virtual user as amalgamated from previously recorded user history records. The events in the history records of the proxy user are associated with the newly-added user. When the newly-added user interacts with a user interface of the cloud-based content management platform, feed entries are generated and presented to the newly-added user
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