I think most of reasons are discussed fairly well on other threads but the most likely main reason is the same as for almost every other show.The time, money, and effort to make it wasn't adding up with ratings it was getting and the money it was making.
When they cancelled the show it wasn't worth the time, effort, and money to keep the website or any other stuff going, either.
Show business is much more about the business than the show most of the time.