I think most of us know where the following message is from:

There have been some recent changes that Google have made with regard to sponsored postings.
Smorty would like to offer you some advice on this issue. Google has primarily targeted PayPerPost member blogs and reduced their Page ranks across the board. Although this WILL NOT REDUCE your rankings or readership, your blog will receive more campaign offers if it has a higher page rank. To prevent any future loss of page rank due to this issue you can take the following steps:

1. Remove all sponsored post tags on each of your posts. Google can follow these tags to determine if you are being paid for posts.
2. Remove any PayPerPost tags on your posts for “hire me” and “review me”. Any general affiliate banners are fine to keep.

So, have you been cleaning up your blogs? It won’t be hard for delete the categories in domains hosted in WordPress, but for Blogspot, we will have to change the categories post by post and it’s a lot of hard work. I don’t know about this but there are a few bloggers who have all those banners, badges, “Review My Post” badges and various categories of the paid posts companies, but their blogs are still being ranked at PR3 and PR4. So, how true is this? I have no idea. But it’s worth a shot. But all PPP blogs have tracking code, do you think GoogleBot can’t find it? I don’t think so.