Some of those dormants accounts could have been reactivated by real owners who happen to have heard the recent news and getting interested in bitcoin again.
Edit:
Most of those accounts are newbies. What are the benefits of hacking newbies?
No. real owners do not log in in rota.
When hacking, you take what you get?
Did you read this thread from op,
https://bitcointalk.org/index.php?topic=1702409.msg17974610#msg17974610Then did you spend more than 5 minutes looking into this?
Added - I'll bring the link here for clarity,
https://bitcointalk.org/index.php?action=profile;u=9000 jakeroxs 0 post November 24, 2016, 08:47:41 AM
https://bitcointalk.org/index.php?action=profile;u=9003 Micro333 0 post February 19, 2017, 01:18:36 PM
https://bitcointalk.org/index.php?action=profile;u=9005 Qrr 2 post February 19, 2017, 01:28:59 PM
https://bitcointalk.org/index.php?action=profile;u=9009 Trance555 0 post February 19, 2017, 01:28:07 PM
https://bitcointalk.org/index.php?action=profile;u=9011 twadsworth 0 post February 19, 2017, 01:16:27 PM
https://bitcointalk.org/index.php?action=profile;u=9012 FictionWobbles333 0 post February 19, 2017, 01:27:05 PM
https://bitcointalk.org/index.php?action=profile;u=9013 MoodFool333 0 post February 19, 2017, 01:28:08 PM
https://bitcointalk.org/index.php?action=profile;u=9014 marish 0 post February 19, 2017, 01:38:06 PM
https://bitcointalk.org/index.php?action=profile;u=9015 BlackRunner111 0 post February 19, 2017, 01:15:55 PM
https://bitcointalk.org/index.php?action=profile;u=9016 jhallsworth 0 post February 19, 2017, 01:28:12 PM
https://bitcointalk.org/index.php?action=profile;u=9020 carter 0 post February 19, 2017, 01:20:13 PM
Funny how the price drove 10 of 20 consecutive, really old accounts, who have never posted in years, to all log in on Feb 19, all at 1 o'clock, then not since, don't you think?
You will find many, many more Feb 19 hacked accounts, if you have the time to look.
Did you see
https://bitcointalk.org/index.php?action=profile;u=9183A nice moving avatar, that will have some value.
I hope you give me some credit for my account analysis. I have studied many more than you. many orders of magnitude.
Try 9119, 9142, 9158, 9163, 9171, 9190, 9194.
You will either have to do more study or take my word for it.
Hundreds of thousands of accounts have recently been hacked. Until we hear otherwise from admin.