thaidomain - 2:52 am on Oct 26, 2007 (gmt 0)
I came to look for information regarding sudden PR drops for our main website. Could not find any reason myself, only been updating and improving the site continuously. After reading comments here, we realized there was a small table on our entry page, containing links to other sites, under the heading 'sponsors'. These were just 'regular' link exchanges. When reviewing the sites on that list, we noticed that one of the sites linking to us (where we also were listed on their entry page) was apparently involved in selling links. There were a number of links on the site with some funny titles and content unrelated to the site in question.
Now, we assume that we were punished because of receiving links (and linking to) a bad neighborhood. The site in question had a high PR till recently, but now had dropped to a PR of 2.
Luckily we found out about this, I guess. We removed our link to that site, and informed them also about the problem.
Of course, we can not prove any relation between our drop in PR, and the observations we made. In any case, it looks quite possible that Google assumes we are involved in link selling or buying, because of our links exchange with a site selling links.
This is actually a bit disturbing, since we offer also a web directory with many thousands of links, and it would be kind of impossible to check out whether the sites we link to from our directory, start selling links after they are listed on our site.
We actually send an email to Google, not sure whether it will have any use. The funny thing is, there is not a single link from our site, that is paid for, and we do not run paid advertisements either.