I don't think you can say that IMDB's management is unaware of how to manage community engagement. It is an offshoot of a usenet community from the early 1990s

I don't think you can say that IMDB's management is unaware of how to manage community engagement. It is an offshoot of a usenet community from the early 1990s and the founder is still actively involved in the site. IMDB is one of the oldest and most successful user-contributed media sites on the web.