I have the data involved in this with more info on accounts creation date. I have it in an excel sheet here https://filebin.net/bn1hyysx0ea5denn
The major finding were.... most of the accounts involved were created in Dec 2024 but many hundreds were from before (likely stolen or compromised).
Only December Data ^^
That's like 90% of the accounts involved here.
All the acccounts invovled ^^
But there is a slight problem with some part of the data, the ones which are old accounts. Some of those old accounts have likely transfered Ecency Points to someone whose accounts got compromised in the past. This might introduce some false positives to the early records (before December).
So, I would not blanket blacklist all the accounts created before December.... they are not many anyways. One example of this is the user @olgavita who sends Ecency Points weekly as a contest prize in their community.