But what did you add and how is it connected to the woke-up of all this old accounts?
No, I mean that I just now added this stat to the page in order to illustrate that the rate is not unusual:
296 users/day in the last month, 520 users/day in the last year.
People often see the big wall of seclog events and freak out, but it's a noisy log covering 30 days, and a high number of events is normal. OP's issue is not part of any wider trend.