There is a name for it... Happens on radio - not only do differents channels from the same network tend go to commercial at the same time, but you can pay to have your commercial be broadcast nearly simultaneously on all channels in the network to increase the chances that your ad is seen by more people. Many ads are target-specific, though, so it won't help. Ads during football games tend to be for beer and trucks. During kids shows are toys and kid-themes eating places. Advertisers don't want people sidestepping commercials by changing channels, especially to another channel run by the same company that you are paying to run your advert. How many ads do regular shows run? Top of the hour, bottom of the hour and two in between? 6 slots per hour? My observation is that during gootball games they tend to run more commercial breaks but with fewer ads. You may only get one or two ads sometimes. change of posession, coach's challenge, booth review, timeout etc. They usually have a minute or two for those. And I know the network has the ability to tell the league to wait for the restart until they get back from current commercial. Nobody, not the advertiser, NFL, TV network or fans wants to miss a touchdown because someone blue-tinted black and white guy with a broken-down mustang is apparently no longer worried about his previously broken-down meat missile.