Churn - Churn is the propensity of subscribers, such as cable, telco, terrestrial or satellite TV subscribers, to stop taking that service because they're moving, no longer interested, can no longer afford it etc. Interactive TV and DVRs help cut down on churn. When DirecTV first partnered with TiVo, not only were they able to use the DVR to attract cable subscribers to satellite, but they also saw a significant reduction in churn from subscribers who were using the DVR.

See the Interactive Television Institute.