Same old fallacy. It only appears this way.
FDev sees odd spikes on income almost instantly - because they have global database/server monitoring and if someone starts getting too much money unusually fast, they pick it up, check logs how its done and assign development priority to it. Development, testing is slow process and may take many weeks - so usually "nerf"/mechanics rework gets released after word already got out.
If FDev relied on public word to find issues with economy, it would be much slower to react.
That's incorrect!
Take Quince for example; Initially it was players stacking 20 missions, and scanning one comm point to complete all missions. It was going on for weeks. No-one said a thing. Then Mr. I wanna show you all how great I am, posted it to YouTube. And Quince became the landing site for the 2nd coming of the messiah.
Enter Fdev! Oh! No, that's not how it was intended. We'll fix it!
Enter fix.. Only allow 3 missions, but give extra credits, and still all completed by 1 scan.
Enter the jealous types! Wait that's still not a great fix! Fix it Moars!
Enter new fix which we have now. Result? Absolutely. Quince is empty.
Example 2: Engineer exploit
Known about from beta testing, allowed to enter production
Those who know about it abuse to hell and back
Enter Mr. Look at me, let me show you this exploit!
Enter general outcry, rattles thrown out of prams
Enter FDev. Oh! Wow, we better fix it. And we'll remove all modules too.
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Unless the general populace knows about and cries about, something, FDev have better things to be doing... Like Planet Coaster or some other game..