Not completely correct. I ended up modifying my first rental (via CHM desk) to use the Delta AWD and coupon code as it only cost $7 more and I saw on my receipt that I earned 5200 Delta miles. However when I tried to modify my second rental later in the week in a different location, it jacked up the price over $100. My corporate code (which allows leisure rentals) apparently does not allow mileage to be earned as I recently realized I hadn't been earning miles but saw a line item on my "past rental agreements" specifically stating that my AWD doesn't allow it. Bummer, but at least I got the bonus once!

-Mike