Redbox, one of the top players in movie rental these days, is not shy about giving customers discounts. Its DVDs are already pretty low-priced (despite a minor price increase last year), but they’re always giving away free rentals for various reasons (liking their Facebook page, for example).

Now, Redbox is running a new campaign where customers can answer trivia questions for discounts on movies. Customers started receiving emails today that look like this:

Email marketing, by the way, appears to be a pretty powerful channel for Redbox, as the company’s kiosks require customers to enter their email addresses each time they rent a movie.

Notice that the trivia offering is powered by Scene It, a popular DVD-based movie trivia game.