Sorting globally by comments in my main page(I block suspicious instances) brings the following post as the most comments post, this year:
So, to put it simply.
Either the post I am suspicious of is highly lucky in comments or that the post comments is full of bots.
missingno@fedia.io 1 week ago
The majority of users lurk, and those that comment aren't all commenting on the same post. It's not at all plausible for 10% of the MAU to be commenting on one thread. Consider that no other thread sees anywhere close to those numbers, this is unheard of.