I guess I don't entirely understand how this works - it sounds like you're introducing a param you don't actually have - you don't know what the clickthroughs are, how they're distributed, etc so this is entirely synthesized. Wouldn't you be able to simulate your way to more or less anything this way?

Seemingly worse for practical purposes, I don't think this data actually exists - adding clickthrough tracking to HN would be a huge change to the privacy profile of the site.