I still think, to the degree the thread article was legit, they are hoping to both motivate their base, de-motivate us (why bother, it's a landslide anyway?) and manage expectations -- so any Dem win at all can be declared Republicans' overall failure.
Telling the base that their party is going to lose in a landslide two weeks from now would have the opposite effect: if “it’s all over,” why work overtime? You may have heard stories about how Carter’s concession early on election night in 1980 resulted in West Coast Democrats who were standing in line to vote to go home instead; such stories may or may not be apocryphal, but, like the best mythology, they describe human nature to a tee, so they don’t have to be truthful in order to be “true.”
And no one leaves their line to vote when they hear that their candidate won.