[DanBC]

Drug trade is multi billion dollar industry.

Anti-drug trade is also multi billion dollar industry.

Seeing how different modes of business work is interesting. This guy raises an interesting point about selling heroin. He does it to earn a bit of extra money to buy drugs. But if he has enough money to buy spare heroin then he doesn't need to sell it because he has the thing he needs.

Also, HN readers enjoy thinking about puzzles and about incentives and disincentives. Stopping criminal gangs earning millions from drugs; reducin harm from drug use; avoiding criminalising drug users; saving money; - these are all interesting and complicatey entangled problems that would make the world a nicer place to live in.

A lot of crime was (still is?) driven by the need to earn money for drugs.