I think it's a result of how the media relegates different sectors of people into different "propaganda" zones. A lot of people like to watch TV. It wouldn't be out of the ordinary for them to spend more time with the TV than with another human being. Others probably don't have the time to watch any TV. The people online on the internet clearly fall into a niche of "wanting", where they're asking for entertainment but none can give them any, so they invent some for their own selves. Now that there's a proper contender for TV in this space, this will become a regular occurrence.

Note: I'm not stating that people online don't watch TV at all -- just that they don't derive the same sort of enjoyment from it that normal people do.