About 6 months ago I got a piece of PLR software, rebranded it and published it to about 20 software/freeware sites with links to my site.
6 months later and I decide it's time to start benefiting from it. Most of the links now have a PR rating of some form and within 2 days of me putting up the homepage the page is ranked PR1. Not a huge gain you might say but I would suggest two things.
- It's very tough to get ranked so quickly, usually using whitehat techniques it's a real struggle getting any form of ranking.
- You are very much less likely to get sandboxed if you have quality backlinks and you have a PR rating of your own.
I don't do any form of backlink campaign these days without incorporating some form of software development and suggest you consider the same.