I used to do paid blogging. This was 2-3 years ago. I decided to start using my blogs for amazon affiliate sales, and I removed any paid links or spammy posts. Then I had google re-index my site. Now, a month after I removed all of the paid links, I get hit with a manual penalty for unnatural outbound links. Either they're looking at a cached version of my site, or they're plum crazy. I told them that their claim was absurd and asked for a re-evaluation. There is not a single paid link on my site, It really boggles my mind.