Someone can own multiple boxes. The box owner puts in the DVDs, but *I believe* that’s ALL they put in when a new title comes out - just the disc. So it takes up very little space. The box already contains a large number of generic, thin DVD cases. *I believe* the machine loads and unloads the individual discs from it’s supply of generic cases.
According to wikipedia: “As of April, 2007, kiosks had averaged 49.1 rentals per day and $37,457 a year in revenue.”
Mrs. Prince of Space
Since Redbox costs $1 per DVD per day and 49.1 x 365 = $17921.50, the "rentals" must be for multiple disks. Hard to believe that 49 people come to every machine every day.