Yes, anecdata: A number of my own highest-quality finds have sink with barely a ripple on the "new" page.
> ... so you can try the same post again. Don’t overdo it. I would say max 2 or 3 times.
Most legit posters have better uses for their remaining lifetime minutes of brain activity than to game HN in such a tedious exercise.
Various software mitigations to recover credit for otherwise lost quality posts occur to me, but the coding effort looks substantial.
I don't even understand how that's possible. Every time I tried to post a link that was already posted (by me or someone else), it redirected me to the original post (and upvoted it if I wasn't the author).
After observing that behavior 2 or 3 times, I assumed HN had some kind of deduplication system.