If the game play is as fun and engaging as they are hyping 9 Dragons Gold to be, then the company could acquire many more customers than just their original niche audience. Taking liberties with an IP can often work out in a games favor if done correctly and presented in an unobtrusive way. This often creates a sense of lightheartedness during game play and can present a new flavor palate for players. One reason why 9 Dragons was so successful was its ability to make fun of itself and include pop culture references.
More players equal more revenue for the company, which usually equals continued content additions and new game play features. Without a steady flow of revenue, no company can keep up with its operating costs, which usually causes a grinding halt to any new development. You don't need a business degree to tell you certain things about releasing a game. Once your subscriptions taper off and you settle into the golden years of your launch; if the numbers aren't in the black, you won't be able to afford the gas in your diamond encrusted Aston Martin let alone continue to pay for new development.
With a much larger audience, companies can afford to take new risks with their development. This doesn't mean changing old systems completely, but allows for new and visceral features to be developed without time line restrictions. This allows developers enough time to perfect their creations, rather then having them slop them down in front of us and tell us to start eating.