this would ruin the economy completely. you can buy NC shop items and sell them. that is no different than buying adena, except that another player is involved in the trade not the trade shop. This is creating a flow of items and adena instead of you just buying adena from the shop. That would also lower the amount of overall items in game as top traders buy boxes with adena. Those boxes turn into items, then sold into market. So you would have adena but nothing to spend it on. This would entirely cripple the trading done in game. this is VERY basic economics, cant just print money.