Goofy hoax:
"The alleged hacker has been busy posting to various image boards and stating that they would send $20 in bitcoin to anyone who spread the word about this hack using the #Protonmail hashtag on Twitter". https://www.bleepingcomputer.com/news/security/hacker-say-th...
"A closer reading of some of the claims, e.g. "circumventing the Geneva convention, underwater drone activities in the Pacific Ocean, and possible international treaty violations in Antarctica", etc, should also cause a reasonable observer to draw the same conclusion". https://www.reddit.com/r/ProtonMail/comments/9xjrch/protonma...