Finally, I purchased a package from someone on this forum (probably shouldn't mention names here?).
Within 3 weeks, I was in the middle of page 3 of Google. Of course I get no traffic from page three, but I still consider the results spectacular. Within another 2 weeks I moved to position 18 for my very profitable keywords. Still only an occasional visit from a Google search of my keyword. I've stayed in that position for several weeks now, so I just put in an order for another blast of profile links. As far as I can tell, they work great. I don't want to try blog comments, because I hate the spam comments on my site, so i won't do it to others. Still, I love the service I got and know profile links work for me!