From my experience, I haven’t seen a lot surveys to take advantage or viral and referral marketing.
You can run a double-sided program in which the referrer and the invitee are rewarded—attribution of successful referral—when the invitee completes the survey.
Alternatively, you can apply the concept of the Leaderboard Competition like Developer Economics does, with Viral Loops.
Developer Economics runs one of the biggest international surveys to understand technology trends. Their surveys reach 16,500+ developers across 150+ countries.
After finishing the survey, you are asked to join the referral program, in which the Top 50 referrers win bitcoins or money.
The more friends you invite that complete the survey, the higher you climb up the leaderboard.
People can share, tweet, mail or even post their personal referral link on reddit.
After the sharing step, you get access to your personal dashboard. From there, you may choose any of the pre-populated tweets as you can see below.
This gives users the chance to tweet as much as they want, without having to think of how to write a new tweet. It makes their lives easier and increases shares by 5x.
Furthermore, from this dashboard you can see your position (I was at 573 🙂 along with your ‘Successful Referrals’ and some extra information of how to get a higher position in the Referral Program and win Prizes.
As you scroll down, you are able to check the Referral Prizes for all positions and also the full Leaderboard as you can see below:
Hope that helps 🙂
