Fwiw, this is the email you recieve when someone signs up through your referral link:
A Friend Just Joined Elevate & You Just Got 500 Bonus Points
Great! Because you set your friend up to join Elevate® with Virgin America, you’ve both earned 500 bonus points. Keep an eye out, they’ll show in your account in 4-6 weeks. Thanks for taking our relationship to the next level. We’ll see you soon