Two of the biggest publishers on the web don’t use the advertising industry’s standardized ad-privacy program, and it’s a problem for even the largest digital-media buyers.
Facebook and Amazon both offer targeted display advertising that can sometimes incorporate behavioral data from third parties. However, while nearly every other relevant media firm, ad network and ad-data firm either uses the industry’s self-regulatory Ad Choices program or operates one that can be easily integrated with it, Facebook and Amazon do not.
via Amazon’s and Facebook’s Ad Privacy Practices Irk Ad Agencies | Digital – Advertising Age.