I read this today written by Inside Adsense Team-- The adsense publisher support. Posted on 17th April 2008. As is true for all sites displaying AdSense ad units, referral units, or search boxes, your site must comply with Google's Landing Page Quality Guidelines (LPQ) if you'd like to use online advertising of any kind as a traffic source. The term 'online advertising' refers to a range of methods, from advertising programs such as AdWords to posting your site within a link exchange or in a forum. However, if the primary purpose of your site is to generate conversions from referral ads, you'll need to go one step further before advertising your site. You'll need to first receive permission from the advertisers whose products you're referring before advertising your site or their products. Please note that Google has made the decision to not allow publishers to use online advertising for any of the Google products or those of our Google Pack partners.Posted by Uladzimir Hrapelman - AdSense Publisher Support I was just wondering when did they updated their TOS with this particular Policy. This year in February or before that? Any comments will be highly appreciated. Does Doogle wants to make clear that any adsense publisher should not use online advertising now etc?