Netflix began selling its Internet video service in Cuba Monday in what appears to be a largely symbolic move driven by the recent loosening of U.S. restrictions on doing business with the communist-run island. The expansion probably will generate more publicity for Netflix Inc. than new subscribers because only a small fraction of people living in or visiting Cuba have the high-speed Internet access needed to stream movies and TV shows. The audience with fast enough Internet service to get Netflix consists primarily of international executives, foreign media workers and high-ranking government officials. Many more Cubans have access to relatively fast Internet connections if they work for state businesses authorized to have the service, but their online activities are monitored. Streaming videos at work is among the activities that could trigger disciplinary action. Most Cuban incomes are meager, too, making Netflix’s $8-per-month service an unaffordable luxury for most of the island’s 11 million residents.