Wait for it
It's gratifying to be rewarded for effort, but the credits should not be the motivating factor. If you are exploring for the money, you will soon get tired of it.
This brings a question to my mind:...
And of course if we die we lose everything, the money, the discovery tags, the mapping tags, everything, isn't life fun.
No, exploration is free money, no effort required, just a 5 second button press...LOL. I got nearly that just jumping around the bubble and casually honking everything + mapping a few planets I wanted to surface mine.
Exploration is.... worthless.
I just got back from a quick trip out to the Bubble Nebula. On the way I was just travelling, and every system already had first-discovered tags. But making a little effort and honking every system, plus scanning all of the usual high-value targets revealed that very few had been mapped. So I mapped them.
On the return leg, I flew a couple of hundred LY off the beaten track and nearly every system on the way home was undiscovered.
maybe they are too "Khan" and forget about the 3rd dimension
in what would otherwise be 'dead time'... yep, worthless...