I think older people / less tech-savy
I didn't want to bring attention to it because I can't play the game or something, but because I wonder whether anti-bot war isn't going into some crazy direction, whether they aren't too hard to solve for humans.
For example I don't really see my parents solving those and I swear they aren't robots.
Especially when the lose streak makes you have to complete 20(!) of them during a single attempt - https://i.imgur.com/ESQvRb8.png
At a certain point the only ones willing to have their time disrespected that way will be the bots. Maybe their plan is to detect bots by annoying and driving away all the actual humans.
Pet theory: Their employees or partner developers aren't quite as mellow as e.g. Googlers when it comes to allowing criticism on HN.
I think it's a weakness that HN allows this to happen by means of flagging.
Maybe @dang knows