Earlier quoted context omitted.
I'm fairly ignorant with the workings of the drug markets but is there any scenario in which a cartel controls distribution and not supply? It seems like by increasing the demand for drugs, the cartels who actually produce the drugs will actually be better off with Silk Road operating.
Why should cartels be involved at all? Unorganized suppliers and distributors could have run the whole market. I don't see any mention of cartels or gangs in the article.
The cartels are absolutely still the people being funded by this activity. Or in the case of heroin organisations like the Taliban.
There is a substantial difference between growing a bit of weed to sell and the industrial scale production required to sell the amounts of narcotics that SR is talking about. Cartels still violently control the means of production and entry into the United States, increasing demand for their products increases their profit and motive for violence.