There have often been hints and clues to varying degrees.
It's hard for FD; they have to come up with clues which can withstand the brute force and brainpower of an awful lot of people (mostly) working together on t'interwebs.
Finding proc-gen stuff is random to an extent but there are methods for (e.g.) finding lots of Earth-like worlds, or finding supergiant stars, or whatever.
Finding unvisited catalogue stars is the sort of thing you can do if you happen to be the sort of clever-clogs who can pull data out of Vizier and spend a little quality time with the Galmap.
It's hard for FD; they have to come up with clues which can withstand the brute force and brainpower of an awful lot of people (mostly) working together on t'interwebs.
Finding proc-gen stuff is random to an extent but there are methods for (e.g.) finding lots of Earth-like worlds, or finding supergiant stars, or whatever.
Finding unvisited catalogue stars is the sort of thing you can do if you happen to be the sort of clever-clogs who can pull data out of Vizier and spend a little quality time with the Galmap.