OK, my 2 cents.

Traveled to Negril for some 20+ years. Been to every parish in Jamaica.

One year we stayed in downtown Port Antonio for a week. Walked all over, every day.
Never saw another white person for days.

NOT ONCE were we offered ganja. The only person that hit on us was a young school girl
who begged money because she said she was hungry. We saw her later and she did buy
food with the money we gave her.

To me the "Jamaica-Ganja" thing is a "tourist thing" not necessarily a Jamaica thing.

In Negril I used to be pestered all the time to buy ganja, until my beard turned white.
Now I'm only offered women. Go figure.