Not really. 2 years ago they started adding stores and a year later they were in 10 times as many stores, but they only had 3 times the sales. Market saturation happens when increasing locations does not bring an increase in sales; they're already reaching all of the customers that they have in the US and shipping overseas is very costly.
You should read the license agreement; it doesn't allow for retail stores. There are 2 stores that were opened in Korea, but JAMN doesn't own them; it's likely that the Marley family owns them, even though that technically violates the "exclusive" use of the Marley Coffee name that JAMN is supposed to have.