[kmanlives]

My account page exists, but I rarely post (4 comments); adding my username to the google search finds zero results, so there are at least 28,701, and likely many more than that.

My intuition is that there are many people that don't post at all or only post infrequently.

[nosequel]

I also mess up the numbers. HN has so many ridiculous ways to log in, that I forgot a couple of times how I logged in (native, google, open auth, etc.) so I've created four or so accounts now. If I add them up I'm > 100, but no single user has 100 karma.