Get players to pay a monthly fee
Hint the keyword is work. Farming resources and rare items to sell is not fun at all in any MMORPG. But with dragon ball gold you start scheduling time out the week as if you were working hourly. Pretty much if you are a paying player you might gain access to certain things giving you a heads up. The thing is traditional console gamers still think there is some loop whole developers use to get players to pay a monthly fee.