I looked at a select number of threads in Alternate cryptocurrencies > Announcements (Altcoins) (board 159), and there is a clear pattern among the following UIDs:
1021758 (this is hacker, but the pattern is less strong)
1082347
980712
1234403
1171587
1527744

With regards to the select threads I reviewed, these accounts tend to post in the same threads, when posting small numbers of posts, they tend to post in groups of 3-5. When they post larger numbers of posts in a thread, they all tend to post in the thread, and they all have a higher number of posts in the thread. In other words, when one of them makes low double digits number of posts, they tend to make low-mid double digits numbers of posts in a thread, and when one of them makes high double digits of posts in a thread, they tend to make high double digits to low triple digits number of posts in a thread.

Some caveats -- these UIDs were not found in a larger data set, they were selected because they were mentioned in your post; the hacker account mostly makes less posts in each thread than the field; I didn't look at the content of the posts, and therefore am not accounting for things such as drama/controversy that may explain the pattern; no statistical tests were done on this data to see if this is different than a random group of accounts, part of the reason for this there is a lot of manipulation in this board and I am presently unsure how to account for the manipulation.

I have posted examples of this pattern below:
UID           Thread     Post Count
980712   2431660   35
1021758   2431660   18
1082347   2431660   60
1171587   2431660   132
1234403   2431660   129
1527744   2431660   66

980712   2612592   25
1021758   2612592   13
1082347   2612592   24
1171587   2612592   35
1234403   2612592   30
1527744   2612592   4

1021758   3289130   3
1171587   3289130   21
1234403   3289130   79
1527744   3289130   18

980712   2431660   35
1021758   2431660   18
1082347   2431660   60
1171587   2431660   132
1234403   2431660   129
1527744   2431660   66

980712   2605122   1
1082347   2605122   1
1171587   2605122   1
1234403   2605122   1

980712   2415359   4
1021758   2415359   1
1082347   2415359   8
1171587   2415359   12
1234403   2415359   4

I want to be clear that I do not wish to pass any kind of judgment on hacker.