We don't throttle specific users*. At one time we did (it was called slowbanning) but that's been gone for close to a decade now.

It's a bit disconcerting how often I say "close to a decade now" now.

* Edit: we do rate-limit some accounts (https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...), which throttles how much they can post to the site, but we don't throttle how quickly they can view the site.