This is something absolutely new to me, and I think its a great idea, this is absolutely a unique concept and the fact that the calls are untraceable makes it even more amazing, But then, there has to be way to really verify that the calls are truly untraceable since if anybody is going to be trying this out, that would be one of the major reasons.

This also is my idea on further development of this project.
1. I think its worth giving it a try, it is an idea that i think would go places if its properly developed, you can have it as a side project which you work on on your spare time.
2. You should also have this on your roadmap, to develop the project into a simple mobile and desktop app simply for convenience, not everybody would want to keep visiting the website any time the need for this service arises, so having a mobile and desktop app will really help in encouraging people to use this service.