Linking Trade Totems
In the year and a bit I've been in game I've seen a few "trade centers" come and go, and most large tribes have a "marketplace" for other tribes trade totems, yet these totems are usually empty except for the hosts totem.
The problem is that to put items on the totems at these places, means dragging stuff clear around the map, and tbh most just can't be assed doing that.
Linking together the totems from one tribe would allow these places to flourish, as items placed on one totem would appear for sale on the rest of that tribes totems.