This just came to my attention and I apologize for the late notice, you have today to opt out, 7/16, the policy goes into effect tomorrow. I wasn't able to find much information regarding it on the internet, specifically I wanted the language of the new policy. I found a few articles with quotes, which I am sharing, but cannot guarantee the validity of the information provided. Also, providing a link to an Inman article, I don't subscribe so I am not able to read the article more than the first couple of paragraphs.
Pennsylvania Association of REALTORS: Privacy Policies: More Important Than You Think
Reddit Discussion: This July 17th Zillow will share all of Dotloop's transaction information with 3rd parties going back to 1/1/16 and all new information. You can request that no info be shared by 7/16/20