I am curious to know how you answer this question. Why would you pay more to get your links in blog posts on blogs that have higher PR when your post is ending up on a PR0 page anyway ?
I think it's to do with the potential to obtain PR. At PR update time a high PR blog is more likely to pass PR from it's homepage to inner pages than a low PR blog. There's also that short period of time that the blog post appears on the front page.
Well you will have to wait for another PR update to see the visual PR changes. New blogs posts may well go up. Secondly higher PR also means (Potentially) better traffic/older domain etc. Finally PR blows anyway... Id go for related blog posts rather than green.
I'd pay more even if the page was pr0 - as long as the blog post was on topic with what my website is about.
yes, it will have pr 0 at the beginning but they will have pr in future and it will be counted as a backlink when it's indexed. i think there is no difference between article submitting and having a blog review
Well it really depends. If you buy a blog post on a blog that was created a few days back and has only 1-2 posts (inlucing the welcome to Wordpress Post)...it probably is a waste of money. On the other hand, a blog post on an aged and high PR site will gain PR...there is no question about it. Also, everyone should already know by now that the little green bar is only updated when a PR export occurs...so who cares what it shows.