I have a sports site. It was making like $0.75 per click for couple of months. Now suddenly, average CPC has dropped to $0.5 or even $0.4. Sometimes, I even see $0.2 or $0.08 per click.Is there an option to set minimum CPC for your ads as a publisher? I can't find it anywhere  on AdSense but competitors like Adbrite seem to have it.
Google AdSense - set minimum CPC?
google adsense;advertising;cost;cpc ads