Why? Back when I was a kid and TV/radio were the only options, it's the ads that often got me to shut it off and do something else as often as not having anything to watch. I would wager advertiser data reflects this. Conversely I noticed a trend sometime in the 2010s my grandkids would watch shows that didnt break to commercial after rolling the end credits but instead segue to a new episode in a mini-view, and they would never leave.