Don’t really know if it is a good idea, this concept of the project may only because some of the investors want to ensure that they investments doesn’t go on bad way and using it on the buildings of the project.
Well aside from the great concept of this project, it is pretty easy to see that the developers are also hardworkers and are experts at what they do and this reflects into the progress of the project. The funds earned and the number of people who believed enough in the project and developers to invest are enough proofs that the project is legit. Now, this will cause more supporters and contributors to come in.