Terrain wipe means the Terrain/Ground resets. So if you randomly dig a hole, it’ll be filled again. I ‘think’ that’s deposits too, correct me if i’m wrong. And Terrain wipes doesn’t do anything to your vessels/bases. Only if you placed them underground, and you Don’t have a landclaim device.
I’m pretty sure economy is about Commodity traders. If economy is rich, then that means you can sell for a lot more, than you buy it. If it’s poor there’s a chance you’ll pay more than you sell.