I was watching TV recently and noticed on a variety of channels, most notably local stations, that their local promos were butted up against the return to the programming. A lot of times this position coming back into the show is a newsbreak that is 10 or 15 seconds long.
Even though I work at a TV Station, I'm all news, no traffic, no sales, no beans. But I am always wondering about things related to my job so I pondered this; Why is this important position ajoining the programming littered with a local promo that is not a revenue maker? And your question back to me may be; Why do you say this is an important position?
The answer is because this is the age of the DVR. That position just before coming back into whatever show someone is watching is the place where the viewer is most likely to see at least the last bit of whatever commercial is playing. It's inevitable when FFing past the commercials that the viewer will miss the intro into the show and have to Rewind back into the last bit of the last commercial. Since it's tough to cue to the exact moment of the re-entry so the viewer is almost always stuck watching a bit of the re-entry commercial making it valuable ad real esatate that is being given away for free.
The first few seconds of the entry into a commercial break could be argued to be the second most valuable real estate based on the time it takes to initiate the FF.