14. The computer program product of claim 10 , wherein the user interaction with the one or more content items associated with the digital magazine includes a length of time to interact with a content item based at least in part on prior interactions between the user and content items associated with the digital magazine previously presented to the user.
15. The computer program product of claim 14 , wherein the length of time to interact with the content item is further based at least in part on one or more attributes of the client device.