This is very similar to the German city-states that were set up along the baltic and northern sea some 800 years ago. I recall reading a very interesting article about this in some magazine, maybe I can dig it up. This model is a win-win because the settlers get to make their own very liberal rules (that the host state doesn't necessarily agree with) while the host still reaps some of the benefits of wealth and education coming into the area. Excited to see where this goes.
Edit: Found the article. It's called "The Politically Incorrect Guide to Ending Poverty" in The Atlantic: http://www.theatlantic.com/magazine/archive/2010/07/the-poli...