I got the same mail and indeed my submission went from no attention at all to stay in the front page for a while. I figured out that maybe it had to be with pos

I got the same mail and indeed my submission went from no attention at all to stay in the front page for a while. I figured out that maybe it had to be with posting time, maybe the email is sent when it's a good time to repost? Or the first upvote is crucial?