Are you a bot? If not, how do you manage to instantly find all the related discussions?

Not too instant.

One of the biggest HN threads of the last week.

Part of it comes from wondering what sources these blog-spammy news sites are getting their story content from.

I’m just curious how you manage to post related discussion links so consistently. Is it not automated?

There's several hours of time lag between the article being posted and OP replying (as I write, 13 hours when the article was posted, 8 hours when OP linked something) -- you and I must have very different definitions of instant!