This is interesting and a good lesson on American policies and politics. I was just reading an article in TIME ( sorry no link ) which says the biggest financial backers for the campaign against prop 19 in California was.... The Medical Marijuana Growers of California... Odd huh? The reason, they already make a lot of money, and legalizing it, would bring in the large agriculture business and drive all of the Medical growers out of business. I can't blame them for wanting to protect their business, but it just seems completely opposite of what you would think they would support. The lesson, it's far more effective to use laws and government to protect profits than to rely on the free market. The free market would invite bigger more efficient businesses to sell and distribute pot, and the small medical growers do not want the competition.