So, I visited the Bitcoin Discussion section today and saw the following self-moderated thread created by this user named RetiredCoder:

Mini-puzzle for puzzle #130

The thread is about a puzzle where the person who cracks it gets to keep the $700 worth of BCH. I read through the thread, and everything seemed normal until I noticed something strange/unusual.

Most of the users posted in that thread were newbies or brand-new who had all (or most) of their posts just in that thread. Some of those accounts were even created recently, while others were created earlier this year. These are a few of them:

llenn1227
Asmodeus_Zero
K0rvexX
ActiveC
love19

Now, I'm not blaming OP for anything, but this keeps me wondering why and how all these users decided to start their posting journey in the forum with that exact thread and why those accounts, which were created about 11 months ago or so, didn't post all this time but suddenly decided to start posting and from that thread alone and have made all their posts so far in that one thread.

This is what made me ask the question and ask your opinion about whether it is a new way of farming accounts or a way to do shilling so that the thread stays afloat and makes it look like it has a lot of activity so that other members can engage.

What do you guys think? Does this seem coincidental to you, or does it make you doubtful like me?