How is it not on the front page? https://news.ycombinator.com/item?id=40154395 https://news.ycombinator.com/item?id=40154395 with 36 points over 10 hours is but

How is it not on the front page? https://news.ycombinator.com/item?id=40154395 https://news.ycombinator.com/item?id=40154395 with 36 points over 10 hours is but this submission with 89 points over 4 hours isn't. The submitter seems to have plenty of karma too.