Here's the full portion of the email relevant to the referral program (it was a general update about AWD being standard, an update on Tesla solar, and then had the following at the end of the email):
Watch a SpaceX Rocket Launch
Several Tesla owners recently unlocked the third secret level in our Referral Program. When completed, they’ll be invited to the launch of the world’s most powerful rocket, Falcon Heavy, and will receive a 2% discount toward a Founders Series Roadster for each referral. Our current program runs until January 31 and allows Tesla owners to give five friends free, unlimited Supercharging with Model S or Model X, or a 5-year extended limited warranty with Tesla solar panels. You can just log in to the Tesla app to share your referral code with your friends. Check out the full program details here.
Watch a SpaceX Rocket Launch
Several Tesla owners recently unlocked the third secret level in our Referral Program. When completed, they’ll be invited to the launch of the world’s most powerful rocket, Falcon Heavy, and will receive a 2% discount toward a Founders Series Roadster for each referral. Our current program runs until January 31 and allows Tesla owners to give five friends free, unlimited Supercharging with Model S or Model X, or a 5-year extended limited warranty with Tesla solar panels. You can just log in to the Tesla app to share your referral code with your friends. Check out the full program details here.