Believe it or not....
Shad, Sankie Pankieism is not exclusive to the Dominican Republic or countries in the caribbean like rent-a-dreads in Jamaica. I too at first thought it was just a dominican thing until I did more research. Any poor country has sankies and sankiettes and people willing to marry or date foreigners for various reasons. That includes some parts of Eastern Europe and countries of the former Soviet Union and Asia. They go by different names, but are sankies/sankiettes just the same. I read a story about a man on the web but I can't post the link because the women he married was not domincan and I don't want to take it off topic. This is a VERY interesting topic for me though. I would like to read the OP's thesis when s/he's done with it, I'm sure it will be a wealth of information.