I got this response from my google rep a week or so ago;
Hello xxxxx,
Thank you for your patience with regard to this matter and apologies for
the delay.
I have heard back from our specialists this morning. They informed me,
that due to multiple complaints from our users and publishers, we've
limited the appearance of certain categories of ads on our content
network, which may have affected your number of impressions. The
categories include, but are not limited to, certain IQ tests, dieting and
weight loss-related advertisements.
I understand that you're concerned about the drop in impressions on the
content network and we apologize for any inconvenience this has caused
you. However, Google strongly believes in providing a positive and useful
experience for both users and advertisers. As a business, we must make
decisions regarding the advertising and business practices that may affect
this experience.
Our specialists have given much consideration to our current restriction
of ads on our content network, as well as its ramifications. They
understand that many of our clients are affected. However, providing our
users with the highest quality ads is integral to the long-term success of
our program.
I will let you know, should I hear back from our specialists with further
details. In the meantime, please do not hesitate to contact us if you have
any further questions.
Sincerely,
xxxxx
The Google Australia & NZ AdWords Team
In other words you can fuck off. We are google and we don't fucking care but your content network campaigns are now totally fucked. On the bright side, all the impressions you were getting are now going to some other lucky bastard so you can wave at him on the highway when he passes you in his new Porsche.
The only solution to this problem is to open new accounts.