A lot of Anime's follow a Manga. The best description of a Manga I could give you is a comic book.
Once the story runs out in a Manga, it usually stops at the same point with an Anime.
Basically, Anime's are meant to tell a certain story and that's it. In Japan there are plenty of other types of shows to bring in ratings.
Most companies don't focus on ratings for revenue. They focus on Dvd box sets and merchandise.
I wish American TV was more like that. Lots of good shows get ruined because they try and milk them until theres nothing left and nobody is watching *coughsimpsonscough*
Our Adrian, which art in Minnesota
Hallowed be thy pigskin.
Thy Metrodome come.
Thy will be touchdown. On turf as it is in Minneapolis.
Give us this day our daily TOUCHDOWN ADRIAN PETERSON.
And forgive us our doubts, as we forgive those noobs that don't believe.
And lead us not into 3rd and 10
But deliver us from fail.
For thine is the speed, the power, and the win for ever and ever. Amen.