Now the PR is for the blog, not the pages in the blog. I am only giving you the root domain so you will need to find a thread to post your comment and link in. That way the sites should not notice the influx of back links. Please don't SPAM the sites, read a post and comment on it with something useful.
No opt in, this is a direct download.
Sometimes the PR is not what my software shows, but such is life. If you are not satisfied with them, then just ask for a refund.
Happy back linking.