One thing I like to do to optimize AdSense for my proxy sites is filter out ads for blockers. If you are promoting proxy service, why would you want to display ads for website filters that just block sites? Your users would never click that because they're looking for the exact opposite
Here are a few domains that I exclude from AdSense because they promote filters:
If I find more anti-proxy sites to filter out, I'll let everyone know. If anyone sees some in your ads, please mention the domain(s) here.