Scrapebox is a very powerful tool if you use it right. Its most powerful feature is its advanced scraping but for some reason it is known for its commenting module. I put this guide together for finding dofollow blogs you can comment on with your URL for automatic approval. First find a Scrapebox auto approve list of at least a few thousand URLs. You can import this list in the harvester to grab comments. To speed up the harvesting process you and remove duplicate domains. Click the grab comments option and set the word limit to at least 10. Unfortunately Scrapebox can only harvest 5000 comments at a time. Just delete the all URLs from the harvester which have already been scraped for comments. Now that you have thousands of Scrapebox comments you can put them in quotes with Text Mechanic. Put these in the keyword box. Remove duplicates and start scraping. Once you have hundreds of thousands of scraped URLs delete the duplicated URLs and open the Scrapebox DoFollow/NoFollow Check addon (you can get this for free in the addon menu). After running this through the checker you will end up with thousands of dofollow blogs to put your backlink on. You can also optionally check PR and remove low PR or no PR blog before running your list through the dofollow checker. If you need any help feel free to leave a reply.
You should also use the free addon to "Remove URLs with more than XXX OBL's" (outbound links). WebDev