the reason why most call this a bad idea is because people play for satisfaction some get it from simply playing and having fun but most get it from crafting and making large amounts of gil (or gold or anything thing else that is the term for money) off of it. people make money from selling runs of something hard for others but easier for them, or just simply doing things that others can't and having something better then everyone else. while getting rid of gil and trade would not affect (or effect god i hate those two words) the third situation seeing how they can do things others can't without gil it would greatly affect those who play simply to get their pride full off of selling good that people are unable to get (if they hog up all the material spots) or to lazy to get. making alot (if not most) of the player base quit because most people play to flaunt something may it be gear or money or something like a world first.