I guess I don't need to make it a mystery. I am the developer behind @hn.
Yesterday, I fixed my crontab entry using ChatGPT again since it mentioned that maybe the executable I want to run wasn't in my path. And it was right! I wrote hnbot instead of ./hnbot, lol.
But now the bot has been crossposting fine and even already earned some sats.
However, it doesn't care about dupes yet. I will most likely fix that today.
Afterwards, I will add multi-session support to minesats.gg. It's getting pretty annoying to get logged out on desktop, when I want to look at my profile on mobile.