Thought this was interesting:
http://www.bbc.co.uk/news/technology-13012041The high proportion of money from such sales that reaches those in the country where the work was done might mean that it could aid development in many nations, said the report which was co-commissioned by the World Bank and development organisation InfoDev.
It contrasted this situation with that of coffee which was worth $70bn annually in 2009 but only $5.5bn of that reached nations that farm coffee beans.