1. A method comprising: at a Set-Top Box: monitoring received input from one or more viewers, the Set-Top Box comprising a temporary power backup, the Set-Top Box comprising a software component adapted to send an event notification to an event server responsive to a determination that the Set-Top Box is no longer receiving AC power, the event notification indicating that the Set-Top Box is receiving power from the temporary power backup; while the Set-Top Box is receiving AC power, in response to detecting that the received input is an interaction of a type of interest, sending an event message to the event server, the event message identifying the type of the detected interaction and an indication of the Set-Top Box and receiving new digital content responsive to the event message; wherein the Set-Top Box uses a network connection for connection with the event server, wherein the Set-Top Box communicates with the event server via packet-switched technology and IP packets, wherein the event server is an Audience Tracker Server adapted to, based on the event message, dynamically rate content usage or enhance content.