As it turns out, alienating the vast majority of paying customers isn’t a good business strategy. Who could’ve guessed? Well, not the filmmakers behind “The American Society of Magical Negroes,” apparently. The film, which generated a decent amount of social media buzz and news coverage for its racially-charged plot (the story features a secret society of black Americans dedicated to appeasing white people in an effort to make them less “dangerous”), just ended its theatrical run after only 21 days. https://youtu.be/gizIbhk5Eu4?si=iLjrb32XSmhUR0zh For perspective, the average theatrical window…