Man, I feel you. Because I am in the same boat BUT making progress. Now Follow this:
1. Don't use free proxies, those sucks. Instead buy good dedicated 20 - 25 proxies for harvesting urls.
2. Use custom Footprints option.
3. Some footprints I just used to scrape 2500 urls:
Code:
"Leave a Reply" "Your email address will not be published. Required fields are marked" "Name" "Email" "Website" "Comment" "your keyword"
"Leave a Reply" "Your email address will not be published. Required fields are marked" "Name" "Email" "Website" "Comment" "your keyword 1"
"Leave a Reply" "Your email address will not be published. Required fields are marked" "Name" "Email" "Website" "Comment" "your keyword 2"
"Leave a Reply" "Your email address will not be published. Required fields are marked" "Name" "Email" "Website" "Comment" "your keyword 3"
"Leave a Reply" "Your email address will not be published. Required fields are marked" "Name" "Email" "Website" "Comment" "your keyword 4"
"Leave a Reply" "Your email address will not be published. Required fields are marked" "Name" "Email" "Website" "Comment" "your keyword 5"
"Leave a Reply" "Your email address will not be published. Required fields are marked" "Name" "Email" "Website" "Comment" "your keyword 6"
4. Try to add as many as footprints with multiple keywords.
5. Select Google, Bing & Yahoo only. (you can select others, but I got good results with these only)
6. Remove duplicates, unwanted urls etc and setup your comments fields.
7. Use Fast poster and you will start getting comments.
Let me tell you about my results :
Scraped blog urls - 3548
After removing duplicate domain, pages - 2805 (all in my niche)
Comment posted successfully: 718
Comment failed - 1790
Checked for live links (instant approved) - 22
I know 22 is not very bing number but I think there is improvement from nothing to something.
Again, I am not an expert as
@loopline but I can give this only info.
I hope it will help you much! Cheers!