Anonymized data is rarely anonymous
flowingdata.com
flowingdata.com
https://flowingdata.com/2014/06/23/lessons-from-improperly-a... https://flowingdata.com/2010/08/03/what-online-marketers-kno...
It's also mention regularly in posts not specifically about that.
Submitters: "Please submit the original source. If a post reports on something found on another site, submit the latter."