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Proton Mail Discloses User Data Leading to Arrest in Spain
(restoreprivacy.com)
And then I am the one exaggerating... I'll say it again, Proton is just another company that managed to find clever ways to profit from a group of people who value things such as "privacy".
They're just a very large marketing effort with little to nothing to show but everyone is convinced they're actually protecting users while they keep pushing proprietary / half open and non standard stuff as solutions for problems already solved with truly open tools, standards and protocols.