Once you convert a user into a funder and receive their gift, follow-up with the second CTA: Share with your network!
Referral traffic is the best kind of traffic, because users are finding your page through sources they already trust-their friends!-and it all starts with sharing.
You want to remove as much friction as possible and to make it almost effortless for your funders to share.
The goal here is to make sharing as easy as possible.
Remember: The easier it is to share, the more likely it will be shared with more people, increasing the viral coefficient.