If its possible, why not open 2 servers? one low rate, 5-10x or whatever, and another for example 200x, with gm shop up to A grade and npc buffer without 3rd class buffs. Those who dont have time to farm, etc, can play high rates. Those who think its too easy, play low rates. most of the high rate players without time would still be non factors in low rate so i dont really think that opening high rate server in parallel would really affect low rate server.