A user is flagged if:

He posted more than 2 two links in the last 1 hour

He posted more than 5 links in the last 5 days

He has posted more than 5 links in the last 30 days and among the posts he posted 30% were flagged

Some thoughts:

First, not everyone here is male. I'm a woman and a demographic outlier in other ways. If you want stuff that's "different," in theory, you are looking for people like me and your criteria would probably flag me plus your implicit assumption that everyone here is male de facto reinforces the very thing you say you want to combat: Homogeneity.

I don't post links daily anymore. I did at one time when I was homeless and trying to find 2-4 good stories to post daily was my cheap hobby because it amused me to try to make it to the leader board while I was a homeless woman and it was a hobby within my budget. I made it to the leader board under my old handle about a month after I got back into housing and then I changed handles cuz reasons.

When I do post links, I tend to post a few links within about an hour because I'm checking the news as part of my daily routine and if I see anything interesting, the odds are good that's when I will see it. And I do that in part because I am a demographic outlier and I have a pretty terrible track record of trying to predict ahead of time what will fly on HN and what won't.

So I try to look for a certain level of quality and that's about it. I really, really suck at trying to predict what HN wants to read.

I also post a lot of my own stuff, which ironically gets me flak at times. Some people complain that the only thing I post is my own writing, which isn't actually true. So that kind of feedback makes me feel like I "should" be posting a certain amount of stuff not by me in order to be acceptable to the community. Though, in practice, as my life gets busier, I simply fail to post as many articles to HN because I simply don't have the time to do that.

But some people are interested in some of the things I write and some of what I write does well and makes it to the front page. Among other things, I still write about homelessness and some people here are actually interested in my perspective on that topic. So I do continue to post my stuff here and let it sink or swim based on votes because I suck at predicting what will do well.

I'm not asking or even suggesting you change your process in some way. I'm just telling you what I see from my perspective and I'm doing that because I'm an indie writer who takes Patreon and tips to support my work. Most of my sites have no ads on them and I handle things the way I do so I can give a fresh perspective on topics.

I post my own blog writing because other people almost never post my stuff. That's extremely rare and my stuff would never see the light of day if I didn't post it myself.

So to my ear it sounds kind of like you are looking for people like me and your formula for flagging stuff probably already has me flagged. Which you may be perfectly happy with. You may know who I am and you may be reading this going "Good! You are one of the people I'm tired of hearing from!"

You do with that feedback whatever the heck you want. I don't need a reply or an explanation or a justification. I don't care.

Have a good evening.