From my limited experience with itch.io, it’s just particularly good games that came out recently. If you want to game the system you either have to wait for a slow couple of days to release or… you know… make a good game. You know… The “easy” part… “Just make a game that people like.”
Sorry. There’s no way to brute force it.
But if you want to see the complete list of game that made it, I think old entries never get removed from the collection that feeds said list: https://itch.io/c/71828/interesting-stuff