During the last 2 weeks we received thousands of clicks from a single content network site, which has used all of our campaign budget and left none for standard google or other searches. So we have received thousands of clicks that do NOT convert AT ALL, and almost none from other standard Google searches!
Ridiculous!
I have reported this to Google and disabled the Content Network immediately.
No warnings what-so-ever from Google.
Since we do not want to run the risk of another useless Content Network website consuming ALL of our budget, we switched-off the Content Network entirely.
There are some very good web sites in the Content Network... but the bad ones are obfuscating the good ones and even taking clicks from the Google search if you are on a fixed budget