1. A system for determining and acting on a user's value for an online game when the online game is accessed from a first social networking platform and a second social networking platform, the system comprising: one or more processors configured by machine-readable instructions to: identify the user that played the online game via the first social networking platform as the same user that played the online game via the second social networking platform; determine for a first metric, the user's first value for the online game based one or more activities of the first user within the online game when the online game is accessed via the first social networking platform and to determine, for the first metric, the user's second value for the online game based one or more activities of the first user within the online game when the online game is accessed via the second social networking platform; and generate a first notification to the first social networking platform based on the first value and the second value determined for the first metric.