Well that actually might happen someday. Not sure where, but some podcast on youtube was discussing almost just that. Electronics companies might strike a deal, where you have a smart tv with a camera and face recognition, where you get a good deal of channels cheaper if you watch the commercials. Also when you rent a movie via their streaming partner, you pay depending on how many eyes are watching.
Off course we all know how easy it is to game face recognition now, but in the future it might not be as Ai algos keep improving. Sadly I hate to see this day when we get to the level where most people will obediently watch the commercials because they can't pay trice the price. This kind of future seems both comical and disheartening, like someone would combine 1984 and They Live.