Why doesn't Cuba turn off the fish frying in Guantanamo?

Cuba has not closed the fish frying in Guantanamo because of the economic, trade and financial blockade imposed by the United States. Because of the United States, Cuba still pays $4,085 in rent every year, but since then, Cuba has confiscated the money. It is said that every year, the United States sends a check to the Swiss Embassy in Cuba, and then the Swiss Embassy gives it to the Cuban government, and the Cuban government goes back and executes it once a year.