Get free backlink blasts using scrapebox

The amount of keywords when harvesting urls doesn't really matter.

You want keyword related urls. So if your 'main' keyword is "free products" you should look for "free products, free samples, free stuff" (Just an easy example). I even use a small amount of synonyms while writing articles. You will notice when you use synonyms google will start ranking your site for the 'not targeted' keywords. Giving you that slightly more targeted visitors.

I also keep a difference between high PR (4-8) and low PR (1-3).
I use comment poster on PR 1-3 with some nice self spinned comments. But from PR 4-8 you really want to contribute to the owners article (aspecially when there dfollow).

RIGHT NOW IM NOT ACCEPTING ANY MORE ORDERS BECAUSE IM FULL, cant handle any more orders because i've lot of gigs to finish on fiverr too

scrapebox is not good for your site ranking. just do the manual blog commenting only.

Count me in if you plan to continue this blast

Are you still providing the blasts ? I hope to learn from you.