Well, after so many people were penalized with Google’s clamping down of bloggers writing paid posts and links, crispnetworks.com was not spare too.
Damn it Google. Now I have to find other online income without depending on Google’s PR.
Google, pagerank
[...] post by Tech, Blogging and Make Money Online Blog | Crispnetworks.com and software by Elliott [...]
Surprise, surprise…. I just found that 2 of my PR3 blogs got zeroed too…

My blogspot blog was slapped a big PR0 from PR4.
You can still do paid reviews while keeping your PR intact. You have two options:
1) Find a No-Robots plugin for your blog and disable Google crawling your paid reviews.
2) Just add no-follow to all links. Google allows paid reviews, they just don’t like when they are used to increase PR. I added no-follow to all my paid for posts, emailed Google and got my PR back.