I immediately guessed that's what prompted this thread when I saw the title.
> I'm not trying to spark a controversy here, but I'm wondering if others feel the same or if I'm just overreacting.
No, you're not. Besides the OP and its abundance of upvotes and all of the green accounts shilling CC and AI, even more disturbing was the older accounts, some created more than a decade ago, posting in a similar bot-like cadence, shilling just as enthusiastically, and in some cases, freely interacting with the obvious bots. (And I say this as someone who's generally preferred to do throwaway posting on HN, so I feel uneasy automatically impugning green names.)
I can only guess there's a black market for HN accounts (as there is for reddit accounts), or perhaps some entities have been seeding bot accounts for years.