Unlike the Cube Island on Earth, Vrelenia already possessed abundant resources and advanced technology.
They only lacked the high-level proper guidance to prosperity. Vrelenia was targeted by the super terrifying race named Ruvoid because the world possessed abundant energy, too delicious to ignore.
The world's inhabitants had to be well-prepared if such a threat would invade again someday. Training the talented young seedlings would be focused on the Sky Library.
Elysia and her family also couldn't protect the world forever. The best they could do was provide guidance and enlightenment through the God System to the faithful, fruitful believers.
Therefore, the Cube Island for Vrelenia didn't need to focus on trading resources, reinforcement forces, or any other support through merit points. What everyone needed was a facility to nurture the high-level experts. The path to help them break through the limits.
Faith consists in believing when it is beyond the power of reason to believe.