Some months ago i have same problem, and send one mail to support asking about my reward, bellow you can see response that i receive.
On Thu, 21 Oct 2004, you wrote:
Unfortunately your account will not receive the one time referral credit
of $65 unless vmmello renews their account next year.
If you need anything else just let us know.
As you see you need wait for 1 year to receive your reward, since your friend renews their hosting plan.