For the very same reason that they endorsed Harper, of course.

Even to the point of the absolute ridiculous :

http://www.theglobeandmail.com/opinion/editorials/the-tories-deserve-another-mandate-stephen-harper-doesnt/article26842506/

The stupid, squeaky wheel now gets the grease and drives media revenues. 

Hopefully, a strategy like this still backfires in Canada.