I recently bought scrapebox and first i want to say its a very good tool with many many uses. After reading some threads about using scrapebox to get backlinks without commenting I was intrigued. So I tried it out and lets just say it worked too good. I think I had about 12000 active URLs to get backlinks from and after I did a rapid index my server got hammered. I had dozens of bots crawling my URL and it got to the point that I had to reboot my server just to clear some of the stale connections. This could be a fluke but just a warning to those of you who are on shared hosting or even on VPS or dedicated servers. The rapid indexer when used correctly will give you EXACTLY what you want!