I agree. As adsense ads are contextual, adbrite can be manipulated as you wish, making them out of context if you want it. I sent an email to Google, since this thread does not bring me a clear answer. I'll post the Google answer once I get it.
I copy and paste the google email... ---------- Hi Codythebest, Thanks for checking in with us about using additional ad services on your pages. According to our program policies, AdBrite ads may be displayed on the same page as Google ads on your site. In general, AdSense program policy does not permit Google ads to be published on the same page as other contextually-targeted ads. You can review this, and all Google AdSense program policies, at https://www.google.com/adsense/policies. Please be aware that it will be your responsibility to ensure that any additional ad services you use do not either directly mimic or attempt to be associated with Google ads. We appreciate your cooperation in this matter. For additional questions, I'd encourage you to visit the AdSense Help Center (http://www.google.com/adsense_help), our complete resource center for all AdSense topics. Alternatively, feel free to post your question on the forum just for AdSense publishers: the AdSense Help Group (http://groups.google.com/group/adsense-help). Best regards, Alton The Google AdSense Team ------------------------