Here's how I'm doing things right now... 1. Scrape a custom footprint with the "you can leave a response or a trackback" footprint for 20,000-30,000 results 2. Send trackbacks 3. Check links to see if they've been auto-approved. From a list of 30,000, I'm getting less than 100 auto approve trackbacks. Is that normal? Obviously I don't put a lot of work into it, so 100 is fine with me, but it'd be nice if I could improve that ratio. What can I do to get more of these per blast?