Well done, nice work!
I've gotten several affiliate sales from one blast by harvesting blogs about a competing product. Then blasting out a comment similar to:
Don't hyperlink the competing product, just yours so people only have one clickable link. Also if you have a CS script, you can throw that in the mix as well for a little more revenue.
Also everyone, the fully rewritten harvester "should" be in ScrapeBox today all going to plan. It uses a mixture of API's and front end web scraping from the engines, along with a internal bank of rotating API keys.
So this should allow the scraping of almost unlimited URL's from Yahoo & Bing without an IP change or being blocked. Google's API isn't flexible enough with query volume, but the Google scraping will also be enhanced.