It's nothing extraordinary and I could be completely wrong. It's not even funny.
I also did not do the necessary research (post counts before and after) to prove my point numerically. It would be too time consuming.
Seeker craves attention, which would be a natural thing that characterizes many here and elsewhere in life. His is just a bit too accentuated.
I believe that he was particularly impressed by the "Here's to Justlooking" thread started by Gavy (if I am not mistaken) to celebrate the 20,000 posts threshold achieved by this great poster.
Seeker may have mistaken Justlooking's reputation as being earned by his prolific posting rather then by the quality of his posts.
Whether it is this or something similar, his normally frenetic posting now won a reason, a mission, an obsession.
He went on combining his old characteristics with this new drive and he has done what he has done.
Other discussions about successful threads have influenced him as well. He used to feed his threads with daily posts and for a while was quite open in his intention to make them "winning" threads against a few others. He rejoiced the progress being an enthusiast player of a game in which he was the only one really playing.
His desire to become the member with the largest numbers of posts clashes with his obsession of threads rivalry, which explains why he does not posts in the threads that could be easily used to increase the post count (Three Words, The Last to Post Here Wins etc).
I think numbers affect him in many ways, beyond UG. He lives in a very numbered world if I can say so.
He has also problems concentrating. He reminds me of some people who tend to laugh often and keep asking questions to make others talk from the fear of being asked themselves.
He is a very interesting fellow.
Of course, as I said I could be totally wrong about it and what's worse the fact that I spent this time to write this post sheds quite a sad light upon me. I should have better things to do. Right? Damn.