It is a dynamic galaxy...maybe what you're seeing is normal price fluctuation over time. I'm sure thigns will pick back up at some point.
But yes, they could be nerfing things and do make changes adjustments all the time...
If it were normal price fluctuation, you'd see a few materials going down in price while others went up as supply and demand changed those dynamics. That's not what's happening. They are
ALL going down.
They've nerfed a lot of the missions as well. Robigo Mine runs used to pay 5 million and 6 million per mission. Now most missions are 2 million to 3 million at most. You might go 5 runs before you see a single mission for 4 million.
Pirate massacre missions are down as well. I used to take the Vette out, kill 30 or 40 pirates and net around 60 million. Now I can't clear 20.
At the rate they're nerfing earnings across the board it will take me a year to make enough for a fleet carrier. Maybe that's the plan though: prevent people from getting fleet carriers as they're already everywhere.