Would be nice that there were forests or caves (both of which are in...to an extent anyway) that had exclusive nodes that had exclusive items. It'd be the only source of it. But due to the nature of caves or otherwise an enclosed area, you can't fly and put up with respawning mobs. Going in with a typical and light party would be enough to get some decent treasures.

I mean you take a look at the trailer where you see them fishing and mining in caves while another party is killing the mobs...none of that is encouraged because there's ultimately no point to it (and infact is typically lower as far as payout is concerned)