I will take a closer look at all these usernames once I'm not mobile. From what I can see just reading the topic, the OP will be removed.
Interesting timing:
According to https://bitcointalk.org/seclog.php (archived http://archive.is/wip/FPMr6)
December 28, 2019, 09:28:29 PM - Nimbulan - woke up
December 28, 2019, 10:02:00 PM - angryswamp - woke up
December 28, 2019, 10:23:06 PM - takingthis4 - woke up
December 28, 2019, 10:43:57 PM - buyinbtc - woke up
December 29, 2019, 11:05:59 PM - rekinthis - woke up
December 30, 2019, 07:18:18 PM - ontrackk - woke up
December 30, 2019, 10:36:22 AM - coin_gambler - woke up
December 30, 2019, 10:40:20 AM - universe_ - woke up
December 30, 2019, 11:08:05 AM - potatopower - woke up
December 30, 2019, 11:12:21 AM - purebitco - woke up
December 30, 2019, 11:14:25 AM - fireball4 - woke up
December 30, 2019, 11:23:25 AM - funbarrel - woke up
January 04, 2020, 06:09:12 PM - useless4 - woke up
January 04, 2020, 06:55:43 PM - skysblu - woke up
Notice to IDs of these accounts and see how close they are.
88178, 198181, 547405, 547412, 547602, 548943, 548945, 552972, 552974, 552978, 552983, 552985, 553235, 553238, 553242, 553575.
Except ID's:88178, 198181, 547405, 547412, 547602, 548943, 548945, 552972, 552974, 552978, 552983, 552985, 553235, 553238, 553242, 553575.
88178 - Registration date: March 2013.
198181 - Registration date: December 2013.
Other accounts are registered in 2015.