I really enjoyed learning that there is lots of experience in game design with land tax and real estate taxes to prevent players from hoarding it without doing anything with it. The later will create stale maps where nothing interesting ever happens. The prevailing logic (I read) is to turn it into a hot potato that you want to get rid of as fast as possible unless you really need it.

I'm not suggesting loot boxes or to genetically engineer monsters to have players hunt them in the park to earn their keep. Our game already has plenty of grind.