https://www.bleepingcomputer.com/news/technology/number-of-third-party-cookies-on-eu-news-sites-dropped-by-22-percent-post-gdpr/

The number of tracking cookies on EU news sites has gone down by 22% according to a report by the Reuters Institute at the University of Oxford, who looked at cookie usage across EU news sites in two phases, in April 2018 and July 2018, pre and post the introduction of the new EU General Data Protection Regulation (GDPR).

Researchers looked at 200 news sites in total, from seven countries —Finland, France, Germany, Italy, Poland, Spain, and the UK.