External notifications of events that take place within a virtual space may be provided to users. External notifications may be sent, for example, via email, text message, instant message (external from the virtual space), push notification and/or through other external communication media. These external notifications may be generated based on parameters, such as user parameters, event parameters, and/or other parameters. The parameters may include one or more parameters that are dynamic and/or one or more parameters that are static. The notifications may include incentive offers. The incentive offers may include offers of virtual items within the virtual space. The incentive offers may require a response to the notification for redemption. The incentive offers may enhance engagement with the virtual space by users.