I just had a thought.

How about, a player run town? Or even simple concepts like taverns. Players can buy shops in towns and set them up to provide services to others eg: carpentry and stuff. They don't have to man it 24/7, and can hire NPCs, whose skills will mirror that of the player. Buyers can access a list of items said player can craft, and perhaps even let the player set prices for their services too. Misc items eg: crafted dyes, can also be added to the list for sale. Requests for items can be made too at the shop itself.

I'm aware this might end up to be another housing situation, but wouldn't that be interesting if it could be properly implemented :O