I had a 3 week break with Adsense on with my proxy. I put it back since the site was a low traffic site, but I check my logs 2-3 times a day. I sent one of my proxy sites to parking with a keyword "Free Proxy" and it is doing very well parked. Had some 300 visitors/day, so parking is doing great for it. Hope it lasts Wasn't worth keeping them up for me since the proxies were just making extra change.