HN submissions tend to be in the front page when they receive a bit of early votes within (roughly) the first hour, but they disappear rather quickly without fu

HN submissions tend to be in the front page when they receive a bit of early votes within (roughly) the first hour, but they disappear rather quickly without further votes. Given that this submission was only 3 hours old when you posted this comment, it is quite expectable. (For the record it's now in the fifth place, suggesting that it has eventually received enough votes to stay in the front page later.)