If you scan anything on your way to Sothis, just by the Advanced Discovery Scanner, you get the money but you don't get the planet details. They remain "Unexplored" unless you make the effort to go look which takes effort.
I dunno if this is a bug or not but when exploring systems inside the bubble, I get 0 for belt clusters I didn't give a second thought to look at or scan. Similar to the above.
Does anyone know know if this is working as intended?
As in, you scan and you get cash, no need to go individually go to each body, get within range and scan it beyond your name being on it if previously undiscovered?
I think this is as intended. You always get 0Cr for belt clusters, but you need to scan one to get the detailed info. If you are mining you need to scan the ringed planets with a DSS to see the detailed ring info also. Scanning individual bodies of any type with the DSS nets significantly more cash (someone quoted >200,000Cr if you scan everything in the Sothis system, for example).
I spent about two hours yesterday circling Sothis at about 50LY distance but couldn't find a pristine metallic ring anywhere, so I've come back to HIP 11879. I know it's only a small contribution to the CG (about 10t of gold per trip, if I pick up other valuable metals as well), but, as Ben says, mining is a nice change of pace and the return is almost pure profit. The only annoyance is that I tried mining in the 1.4 Beta and the improvements to the refinery and prospectors make so much difference. Shame we couldn't have had them in time for this one.
