Flipbox is offering the first rental free when you sign up your email address. Flipbox have automated machines where you can select a physical movie to rent. They are often located at supermarkets but you can search for locations near you.
From gzt on Geekzone:
When you are signed up they regularly send additional (genuine) free rental offers, and 2 for 1 offers. On the kiosks when movies are end of line it is not unusual to see $10 buy.
Swipe cc card, select movie, checkout. Try any other sequence and the kiosk software is pita ; ).