But does that type of strategy extend to local communities and Spiritual Healers?
I don't think the math supports that. The team of "expert consultants" who would come up with a plan like this and institute it would charge more in their salaries than the increased consumption in Chiapas is worth. Also, ask yourself why a strategy like that would even be necessary in Chiapas???
You don't need to trick people into buying Coke when they don't have access to clean and affordable water.
So Coca Cola FEMSA's marketing people develop and execute their marketing strategy. Just because Mexico is a relatively poorer country doesn't mean that the business people are a bunch of bumpkins.
People in Chiapas may not be drinking Coke by the gallon, but it's a product with drug-like margins. They have a positive customer value, or Coke wouldn't be doing it.
The high level process is: Create need (subvert the healers' credibility), make the product indispensable (attach to healing ritual), link to outcome and provide a sample (feeling better = Coke)
Most infamously, Nestle used techniques like this to sell powdered baby formula in third world countries -- a practice that literally killed thousands of children in the process. In the United States, Coke is co-branded with lots of other things that people like: McDonald's, Movies, Christmas (Santa = Coke), etc. Coke is the master of applying this marketing pattern.