The comment looks to me to have been quite organically upvoted. The upvoters are mostly users who've been here for years (in many cases, a lot of years) and have posted and voted on all kinds of topics in the past.
"Please don't post insinuations about astroturfing, shilling, bots, brigading, foreign agents and the like. It degrades discussion and is usually mistaken. If you're worried about abuse, email [email protected] and we'll look at the data."
"Please don't comment about the voting on comments. It never does any good, and it makes boring reading."
While I have you, could I ask you to please review https://news.ycombinator.com/newsguidelines.html? Note these two of the guidelines:
"Please don't post insinuations about astroturfing, shilling, bots, brigading, foreign agents and the like. It degrades discussion and is usually mistaken. If you're worried about abuse, email [email protected] and we'll look at the data."
"Please don't comment about the voting on comments. It never does any good, and it makes boring reading."