[GrowSurfShareURL]
[GrowSurfParticipantID]
[GrowSurfParticipantFirstName]
[GrowSurfParticipantLastName]
[GrowSurfReferrerFirstName]
[GrowSurfReferrerLastName]
[GrowSurfReferrerEmail]
[GrowSurfTotalReferralCount]
[GrowSurfMonthlyReferralCount]
[GrowSurfPrevMonthlyReferralCount]
[GrowSurfNextMilestone]
[GrowSurfNextMonthlyMilestone]
[GrowSurfTotalInviteCount]
[GrowSurfTotalImpressionCount]
[GrowSurfShareURL]
in your emails to provoke your subscribers to make referrals!