That's right, it won't last forever.

But as long as the developers keep up with every update and they've got a lot of plans in the future to scale the game and add more feature, I think that will be enough to sustain the game and make its investors and players stay.

If this has proven to be a good game and can sustain all of its players with nice income and its server is well provided, I think they'll last until we'll never know.