I suspect the people targeted(if it was more than just me, who knows how much or little they tried) are those that were part of the leaked DBs and lists.

If you're a "newly joined", you should not be in those.

Would love to hear some official word on this, even if - hopefully - this is all just a "storm in a waterglass" as opposed to anything really/truly dangerous.

I mostly want to know my (new) data isn't compromised and that this was indeed their official notification email.