20th Century Fox did this. You get 1 code to use for either movie. I do not have 2 separate codes. I guess they figure after you have one in your digital library you're likely to purchase the other. Just a guess.
The code came with the 3rd film. If you notice in the 1st pic there is a pic for both movies on one code above it says your choice. I'm sure after having 2 Fox assumes you'll pay for the 1 that remains,.