The problem with all artificial languages is that, nice as they are in theory, they still don't eliminate all of the problems that learning a real langauge like English has. Plus, they don't take off because they will only work if enough people are learning them. Given that few are, they lack the critical mass to emerge as anything powerful- Esperanto has been around for donkey's years.
Why learn something no one is learning- this always strangles them at birth pretty much.
They also lack the complexity to develop into full languages because they don't have a large enough speech community obver time to develop the full needs of expression a human has.
They would be very good for tourism and travel though. I'm not sure about business as that involves the details and complexity of law.
