if you look at the page source, when you see those ads, do you see weird .js scripts?

seeing this, looks suspicious

and seeing .js from ajax

try blocking 'pagead2.googlesyndication.com' [Google AdWords]

www.google-analytics.com

google-analytics.com

ssl.google-analytics.com

Ros'ty might want to look at removing 'pagead2.googlesyndication.com' from their page.
-benefit of the doubt.

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