That said, film crews frequent Dubrovnik in the winter, and not just Game of Thrones.
Dubrovnik is primarily a tourist destination in the summer months, so Mato Frankovic doesn’t need to worry about tourist overpopulation all year round.
We’ll have to wait and see if Frankovic has any plans to limit how movies and shows can be filmed.
Assuming King’s Landing isn’t consumed by any of Cersei’s wildfire or burnt to ash by one of Dany’s remaining dragons, Dubrovnik probably has at least one more season of Game of Thrones in its future.