This received 23 points in 30 minutes, and yet it is no longer on the front-page? Compare that to this [1], which has received 23 points in 4 hours, and is still on the front page. Are some folks flagging this into oblivion?
I've emailed the HN mods to ask if they have any insight. Maybe it hit some sort of algorithm to prevent spammy posts.
Edit: we've updated the title and turned off some of the flags.
I'm the original poster but I sure as heck didn't do anything to artificially upvote it. I didn't upvote it at all.
As sctb said, though, it's user flags that affected the post's rank the most. Perhaps the editorialized title had something to do with that (https://news.ycombinator.com/item?id=18097611), and/or perhaps there is just fatigue with this class of submissions. People come to HN for unpredictable things, so whenever something starts to get predictable, they get ornery.