First of all, you need to choose our Goal Based Rewards campaign. In this case campaign participants(referrer’s) would enter your campaign, and share your message link. Then when someone clicks on the link they will be tracked. If they complete the sign-up process in the future (this event will be tracked by our conversion tracking script that you'll need to paste after your questionnaire, e.g. into a "thank you" page) the original referrer will get his reward or will be notified about it. You can reward referrers only once for every candidate or number of candidates they invite.