The availability of SG and GH in the US is very simply a function of how much the importers/distributors order and how much and wnen they decide to dribble it out to the trade. Gawith’s customers are :
(1) In the U.K., retailers who order directly through Gawith’s domestic distribution arm which also distributes other products to such retailers, such as Stanwell pipes;
(2) In the rest of the world, properly licensed importers.
To beat this dead horse once more, as I and others have posted in this thread and other threads, and on other forums as well, including official posts directly from the company on Facebook and another forum , the availability of Gawith products is strictly a function of what their customers - who aren’t individual smokers - order, and how these customers choose to distribute it to the trade. There is no need for more complex theories.