Talking about gaming the ratings and user reviews on sites likes IMDB, I surprised by how often it doesn't happen. The Matrix at this moment has 1,336,956 user

Talking about gaming the ratings and user reviews on sites likes IMDB, I surprised by how often it doesn't happen. The Matrix at this moment has 1,336,956 user votes and 3739 user reviews -- and that's to be expected. But I regularly come across movies on IMDB that have less than 10 votes and no user reviews at all. Or a single user review that happens to be negative. These are movies less than 10-15 years old and with budgets of at least $1 million. It's totally puzzling why the director, producers, actors, friends of the cast, or anyone else connected with the movie didn't bother to add a user review. Someone had enough passion to make the movie, spend all that money, work on it for months or years, and they haven't heard of IMDB?