We need a nice "I don't know how to make credits" catchall thread for these kinds of posts.
Let's wind back time, to the week before the launch of 2.4
There were a pair of CG's, one for Liz Ryder, one for Professor Palin.
I made a marginal effort towards both, then the day before the release of 2.4, I packed up my Beluga, grabbed a passenger wanting to make a roughly 6,200 Ly trip.
I plotted out my first 500 Ly, which took me through the Coalsack Nebula, which has been on my list of places to visit for a while anyways.
Then I plotted my next 500 Ly, closer to where I was going, and off I went.
It didn't take long before I was in completely unvisited space, and started scanning, from the Primary Star to the last ball of ice in the system.
Then 2.4 launched, and I replotted my course, now that we have 20,000 Ly route plotting and the option to plot via dwarf and neutron stars.
I was at 200 Jumps to reach where I was going, and I went, scanning every square inch of space along the way.
On the 7th, I reached my destination and started my return trip. I made it back by late afternoon on the 8th.
It took me 17:50 to sell all my data and list all my first discoveries.
I dropped off my passenger and then went and collected my outstanding CG payments.
What did I make from all this? Around 63 million credits. Did I feel rewarded? Sure did.
Now, let's flip things around some more - now I'm back in the bubble, bought my 3rd Orca, outfitted it the way I want, flew it around, collected some replacement materials for what I used engineering my new ship and starting goofing around with it.
Took a passenger, blew up some bad guys, stuck some repair limpets to damaged miners, and... at the end of the day I made.. a whole 1.2 million credits. Did I enjoy my time spent? Very much so.
Let's flip this around once more, to about a week before - I bought an Anaconda, my second, outfitted it, engineered it, and found myself wanting for funds.
I know a great little spot to smuggle certain goods, so I opted to give my new Anaconda a go at this - first trip, 14.2m, second trip, 14.2m, third trip, 14.2m, then I switched to my Keelback which I keep in the area, as it's easier to land and made 3 more trip, each 14.2m. Total net, 85.2 million credits, each trip takes about 15 minutes give or take. That covered what I needed to make up for what I spent on outfitting, then it was back to doing other things. Was it fun? Well, there's a reason I only made 6 trips - yeah, it's fun for a little while, but after a few trips of running goods around, I'm ready for something else.
The point is, it's really not that hard to make credits, without having to rely on Gaming the Play and just playing the game.