I heard someone saying: "Refuting bs takes one order of magnitude more effort than producing it" and i guess that applies well to our beloved Stewie here.
The only question being: why is he losing so much time to fud this project when there are tons of war worse projects that don't get even a fraction of his attention?

Does he have an economic interest in fudding HEAT? Maybe.. but it has been going for so long, it's quite unlikely (or he's the biggest HEAT whale out there)
Is he enjoying it? Probably, i like to imagine him with the classic troll grinn while turning on his PC, ready to shitpost... but again, the internet is vast, and it has been going on for months. Isn't porn or videogames better?

It's a mistery!