Imatag published the following study of relevance to any photographer.
Imatag's in-depth analysis of metadata compliance in images circulating on the web, from their creation by photographers to their publication on news sites - especially in an era threatened by fake news - is a first.
The results have been gathered via a deep analysis of data from hundreds of thousands of images, an analysis carried out by IMATAG * researchers, specialists in image protection and identification.
The complete study: https://imatag.com/en/blog/2018/05/11/state-of-image-metadata-in-2018/
Article by Thierry Secretan: https://imatag.com/en/blog/2018/05/11/who-kills-our-metadata/