A WebmasterWorld thread reports a search advertiser receiving an email from Microsoft's adCenter team about his ads not showing up in Bing. The email basically said that his site was reviewed by the QBR (Quality Based Ranking) team and they were deemed low quality.
Here is a copy of the email, as reported by the advertiser:
I have been looking over your account and can inform you that the resultant drop in traffic has been due to the websites that you advertise being reviewed by our QBR (Quality Based Ranking) team who have deemed them to be of a low quality. The QBR team determines quality and relevance of sites by assessing:
The advertiser said that the same ads and content passed the AdWords quality score, with no problem, so why not Microsoft's adCenter quality requirements?
I don't believe I have ever heard of the Quality Based Ranking team before, I know adCenter launched the quality based ranking algorithm in April of 2007, but I never heard of a human team that monitors it. It makes sense that there are humans, so I am not surprised by this, but I thought it would be nice to document such an email correspondence.
Forum discussion at WebmasterWorld.