From the article: "Unusually for a site like this, FamilyTreeNow doesn't require a fee, or even the creation of an account, to access those detailed profiles (assuming, of course, that person hasn't already opted out). "

 The key word for the public is "fee."  You can get a lot more information from sites that charge a fee, that's what the police use; just saying.  BTW this story comes from the Washington Post which is owned by Amazon.  Amazon routinely aggregates data - just read the privacy notice.  Ironic that folks should be so concerned about this now that NSA is sharing their raw data with at least 16 other Federal Agencies and foreign governments as well. 

"NSA Given More Ability to Share Raw Intelligence Data" 
https://www.schneier.com/blog/archives/2017/01/nsa_given_more_.html