There's regular security solutions then there's those meant to stop High Strength Attackers. I warned ProtonMail's team and infrastructure wouldn't handle the latter. I was expecting stealth 0-days, though, given there's DDOS mitigations available. That they went down due to DDOS was a bit of a surprise.
"Cost estimates for these solutions are around $100,000 per year since there are few service providers able to fight off an attack of this size and sophistication. These solutions are expensive and take time to implement, but they will be necessary because it is clear that online privacy has powerful opponents."
No shit lol... Not a good sign that they're already in reactive mode. On other end, that MyKolab hasn't gone down might mean they're already compromised or just not targeted by this attack. I wonder what it is. They're just a GPG carrier in a semi-neutral jurisdiction in my usage, though. ProtonMail would've been, too, but I figured they'd be more likely to have service issues.