I think my server's a little unique with its use of /more + having an economy. I have /more usable on only the most basic of things such as dirt, stone, wool, fences...basically just blocks. The rest of the items are on the un-dupable list and fit into the economy somehow. Our economy uses the outdated PhysicalShop where I have it set up to use gold bars as physical currency (my preference). My dilemma is that even though there's one other /more plugin out there, voxel provides the only one with an undupable list, however the /pick command has some loopholes. Luckily not everyone on my server knows about /pick. I just choose not to tell them.