Doubtful they will reintroduce the exchange market, people didn't need to spend money on RPs because of it. Everyone was also selling items for ridiculous prices, for example 2x upgrade weapons were going for 20k-50k RPs which equates to 200$-500$. It got to the point only those willing or capable of spending 1/4 to 2/4 of their paychecks were playing anymore.