I recently bought some plugs on some well known foreign sites that added about 20-25% to one of my site's daily traffic (many thousands of uniques). The problem is, this traffic visits my site and seem to click ads a rediculous number of times. Enough to catapult my CTR to 12% from around 5%, from just 25% increase in traffic... meaning their CTR is probably closer to something like 25%! As a response, Google has dropped my PPC to almost nothing so I'm actually earning LESS than I was at 5% CTR. My question is, has anyone else noticed that a large volume of foreign traffic seems to shoot their CTR through the roof?