"You're posting too fast" is a limit that's manually applied to accounts that have a history of "posting too many low-quality comments too quickly and/or getting into flame wars". You can email dang (hn@ycombinator.com) if you think it was applied in error, but if it's been applied to you more than once... you probably have a continuing problem with proliferating flame wars or posting otherwise combative comments.

I think you also can get it by just having unpopular opinions. Hackernews used to be much more nuanced than it is today imo.

Uhm... did you even check my account age ((and my old one is two years older))

It’s really easy to get throttled for a single comment out of thousands.

> Scary fn thought!

I'm a kotlin programmer so it's a scary fun thought for me.