A lot of assumptions there.
Lash out with a 10 baht 1grm purchase and let us know your boots on the ground conclusion.
Maybe these guys have 10 baht weed sales as a loss leader?
Whenever they do it's always sold out by the next day.
The fat banana I got that was rock hard dry and powdered when crushed has been sitting in a bowl in my pit for 5 days now and is starting to soften up.