Ok, I've now spent about 20 hours working with the Scrapebox whois. I've played with large sets of proxies harvested by scrapebox itself, I've used paid for premium proxies, I've tried various delay settings and retry settings. I'm only looking up .COM, and my internet connection is good: 12mbps Up/115 Mbps down. Conclusions: 1) No matter what the settings are, with good proxies the success rate is always near 17%. The rest are "completed, no data", whatever that means. 2) If you don't close and re-start the WHOIS add-on every few hours it will crash and lose your collected data. 3) There is a bug that prevents it from opening URL files at times, claiming every file you try to open is "in use by another program" when it's not. Close whois and restart and the bug goes away. Has anyone found a way to improve upon 17% success?