Not really sure. Perhaps ratings, and IFC pulled the plug. IFC has been having issues with profits lately (via showing commercials which they never used to and then having original shows to properly fund). WKUK season 4 and 5 dvd's have to yet to be released and it's been how long? It won't be the last time we see them. They're too talented and still very young. So now when we see them, it's more special due to limited access.