this is for me like to rent a piece of land on the moon: and what are the benefits of it? May be in 200 years, we can build a city on the moon and can make our holiday over there, but one thing is clear; even I own it, I will not see it

Not even in 200 years comparing to your example, because they only sell you a virtual things and not real thing. Their app use augmented reality to put virtual word on celestial GEO-space. Therefore, you never own it out side of their app. However, if their app get mass adoption by people that virtual thing will get value.