Back when image boards had their run, using this technique to get posts with „rare“ combinations of digits [1] (e.g. „dubs“) boasting about it in that very post was a popular pastime. Some folks even built serious analytics models around it to achieve a pretty good hit rate. I haven’t been around for about a decade, so I do not know whether it is still a thing.

[1] https://knowyourmeme.com/memes/get

>Basically I guessed the id of the submission

That's... kinda of letdown. Was expecting a more intrigued approach but apparently HN is slow enough for guessing to work.

This is one of the reasons I prefer uuids for any public facing IDs.