Does anyone know of an economical way to track rankings? We track 1000+ keywords weekly. We use SEO PowerSuite Rank Tracker - but it eats up proxies like crazy. We need 100+ proxies minimum. Would adding a VPN layer help keep the proxies alive? I have also tried SerpBook. SerpBook is good, but there again it's $79/month. There has to be a less expensive yet reliable way. Help?