I find it likely that they were created by the admins here to repost threads and comments from other message boards in order to make these forums seem more active and drive site traffic to them. This thread wasn't created on this site, it was pulled over from another forum (a lot of threads here are copy and paste jobs from other sites).  So my guess is that they are official bots. There are others outside of these three like Novi, peanutcoins, and Sana who are also bots. Any threads created by them are ones taken from elsewhere as are all of their posts.

Zolace, Rigon, and umair127 are all computer bots. They won't respond to you.

Sorry to disappoint, but none of the posters in this thread are human, they are computer bots.

It's not simply that. It seems like a number of posters here are bots that take content from other forum boards and copy and paste it here in order to boost site traffic. this thread and most of the posts here were poached from another forum.

I didn't realize that my work was so inspiring that it was worthy of mimicry on such scale.

Apparently so, as well as an AE of most of the other posters in this thread.

I didn't realize that my threads were so popular.