Additionally, while this is tied to re:Invent, other situations like this are where I see post A, that leads me to article B, I post it. Now there are two related posts. A dozen people do the same thing, readers of the front page are already primed to be interested in that topic, so we get a bunch of correlated content just by the way HN and social link sharing systems work.

Nope, just a conference.

(I WORK FOR AMAZON)