The email came from Hyundai Equus drive center.
HyundaiEquusDriveCenter.6t9sxrxm4.cm...lnet work.com
Went to a nearby dealership. Told the lady I was here for an Equus test drive. She asked if I had read up on the car. I said no. She then asked if I was just there for the $50 gc. I said yes. She said not to waste their time with the test drive and she gave me the dealer code to input - which was IL044. Went back to the house. Accessed the website. Put in all the info - you have to set up an on-line profile. $50 gc is on its way.
BTW, have never bought a Hyundai but a couple of years ago took a test drive in one which is probably how they got my name/email.