Obviously all of what dang said, but I want to add that I think timing is an additional factor.
If you post when silicon valley wakes up on a weekday, you might get “initial” points faster, which leads to your submission being ranked higher up for a while and being more discoverable.
That (\/) (;,,;) (\/) I’m helping! feeling upon discovering a mod has bumped one of your 04:00 UTC “oh, this is interesting” posts that nobody else saw.
If you post when silicon valley wakes up on a weekday, you might get “initial” points faster, which leads to your submission being ranked higher up for a while and being more discoverable.