I had a data breach on password saving app/site I was using. The app had about 50 logins of mine. I created a new email address and changed all password as soon as I was notified which was pretty quick. I have not seen one attempt at trying to login or failed logins etc.
I updated emails on this site. I am still getting new member notifications, admim question notifications etc.
I will do some testing this week on thread notifications and see if I can find anything.
If anybody else is missing them please let me know so I can tell if its member or group related.