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Proton Mail Discloses User Data Leading to Arrest in Spain
(restoreprivacy.com)
This is a most excellent place for technology news and articles.
Companies selling data don't tend to be picky who they sell to. Governments and police buy data all the time.
The best part is a government can buy data and and can change the rules on what is illegal.
So, if they decide tomorrow that your innocent behavior is a threat, you're now a criminal.
Not to mention the fact that any new place your data is stored is a honeypot for criminals to try to hack. The more sensitive the data the better. Not every organization has the same protections and they will get your data stolen at some point.