Hmm i just noticed but where did the fact of national STARs pushing out from TWC come from? I thought the only two national STARs were at DirecTVs/Dishs headends
Prior to the late 1980s (I believe 1987), viewers without a local WeatherStar, or with a malfunctioning unit, simply saw a black screen (or the briefly-used background animations) and heard the local forecast music whenever a local forecast was playing. In 1987, a primitive scrolling "Travel Cities Forecast" was used that eventually evolved into the same format used by the WeatherStar III and, when it was released, the WeatherStar 4000, including the switch from text-only to graphical forecasts. In the mid 1990s, this was changed when a series of maps (national and regional radars, satellites, and forecast maps, along with forecasts for selected cities) began, and this has changed several times since, though not in the past few years.
Things have changed over the years then
Today a headend with no STAR would simply see national stuff thrown at them but no cable ID display, no displays during the LF, etc will come up. Over at DirecTV and Dish Network they have modified IntelliSTAR units to display national information during the LF, display a cable ID, and push out text during those commercial retailer screens (i.e. the Honda generators screen)