I'm sure that it limits their abilities to have certain types of business, or businesses in the sense that we would normally view them. In some of those regions, though, they can have small, home-based businesses that provide services for the area, nothing major. For example, in the community where my ex-husband's family lives, one of the residents has a store that she runs out of a room in her house. She goes in to town and gets supplies and then sells them to the people living there for a higher price. She makes her money from the profits, and they can get basic supplies without having to drive to town. So if they only need toilet paper, it's easier and cheaper to buy it from her, but if they need a lot of supplies, it is better for them to go into town themselves.
I think it's great that your aunt was able to provide that service for those businesses that needed an address. That definitely was a positive influence on the local economy. I just finished taking a Master's course on organizational systems of society and this would have been a good article to share in class discussion. We did have to read a book called "The Bottom Billion". It was a good read and talked about failed/failing States. It was written at a time when the world population was around six billion, and it's grown since then. There are many issues that people in those countries deal with on a daily basis that some of us have never even contemplated.
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"One language sets you in a corridor for life. Two languages open every door along the way." -Frank Smith