I think you should be able to, but this site is not affiliated directly with Tesla (its a fan site) and I nor any other volunteer moderator like me work for Tesla (neither do the site owners).
Teslas website about their current referral program is here:
Share your referral link to earn credits when friends and family join the Tesla community. Learn more about referring friends, redeeming your credits for awards in the Tesla app and more.
www.tesla.com