HN users can make 5 comments every 4 hours, and I presume there's some hurdle in the way of making a lot of users as well. Also they get downvoted and hidden,

HN users can make 5 comments every 4 hours, and I presume there's some hurdle in the way of making a lot of users as well. Also they get downvoted and hidden, alongside controversial but correct opinions. The person who replied to this saying they have multiple accounts is shadowbanned - so clearly, they don't really have multiple accounts.