For parody subreddits, I think there's a rule that at 80k subs, it starts to become the very thing it was parodying in the first place
Maybe people did notice, and just decided to take this subreddit for something else than laughing at over-patriotism. It's a very successful strategy against shaming, if you can pull it off - just not being ashamed and not being afraid to demonstrate it. Reddit provides excellent venue for that, subreddits being good Schelling points.
I was thinking a combination of Poe's approach to subject matter with Moore's approach to the increase of transistors (users/ traffic in this analogue) over a period of time.
It was more of an offshoot of the gamer gate crowd. There were a few different pro Trump subs; TD just so happened to be the one that took off.
It is a pretty honest sub though; It's supposed to be a non stop Trump rally - clearly subversive content and discourse will be banned and removed.
Source: was there when the original mod drama was kicking off at around 30k subs. Can't remember the guys username but he got booted once the sub took off (around 100k subs) and its almost certainly run by mods on the campaign dole currently.