Grade

Grade refers to the amount of NX a Nexon customer has used. It acts as a restriction to who may enter the Black Market server at any one time. This restriction is subject to change, as a user's grade level changes as the player purchases more and more items with NX. The grade is based on a cumulative amount of NX that has been used to purchase items on a particular account:

Trivia

 * It is unknown how many Diamond-Grade users are currently existing. B3nNeY and --_STABBY_-- are both confirmed to have reached DG-prestige. They can be viewed here and here respectively.
 * Nexon has changed the Bronze grade requirement several times, before reverting back to its original amount.