Whenever a big budget movie comes out we see some statistics like first week earning breaks this and that record. So money/earning also became a source of addressing success or failure for that movie. IMDb shows us some stats like budget for the movie, gross earning, net earning.
Though it can't be a measurement for the quality of the movie, but somewhat it gives an idea that yes this is a popular movie. Specially I use this stat sometimes for movies that are not in English. It helps me somehow to have an idea about the popularity of the movie (hit or flop factor).
But for a TV show the above case is not true. The front end audience only gets to know a TV show is on for next season or not (to my knowledge). Earning stats are not that much revealed that even if a show is a hit, it it cut off because of the earning!
So here are a few questions. How is budget calculated, season wise or episode by episode? How is earning or profit calculated? Is there any way to see those stats like for movies in IMDb? And lastly how do TV shows actually earn money? Is it only through advertisement?