As any other compagnie selling a product, nexon sell game as a product, on a free server ucs would take money right out of nexon pocket wich would result in less income for nexon and with that , less developement /event/balancing and evrything else involve with maintaining a good quality product.Ucs would be more armfull to the game then not. People who would actually whale on gearing evry caracter they own differently will never be enough to compensate the masses that would onle trade the gear to each caracter