The government is, actually, extremely slow. I don't remember exactly how it was, but I think there's only one state in US in which it is illegal to have plans

The government is, actually, extremely slow. I don't remember exactly how it was, but I think there's only one state in US in which it is illegal to have plans to smoke weed in Netherlands. But even that has taken years to implement. My guess is that the market must not be too big, so as to stay reasonably under the radar, and not too small, so the businesses in another country can be profitable.