Blockbuster is not merely the name of a defunct video rental chain, but also a word that means “hit movie” (popular film that everyone sees).

Check out the Chinese box office for American blockbuster movies. China is a huge source of revenue and there's even movies where most of the revenue came from China https://www.the-numbers.com/movie/Warcraft#tab=international

That's why Lebron James shuts his mouth when China is the subject.

He wants to be a hero that fights for people's rights unless there's money involved.