What motivates people to share a product with friends — personal gain, or the joy of helping someone else?
Airbnb ran a revealing A/B test to find out. They tested two variations of a referral email, both offering the exact same $25 reward, but framed in two entirely different ways:
- Self-Interest Version:
“Invite a friend and earn $25.”
- Altruism Version:
“Give your friend $25 to try Airbnb.”
On paper, the offer was identical — both sender and recipient would receive $25. But the psychological framing made all the difference.
The Results?
The altruistic message performed significantly better globally.
This test highlights a powerful insight into human behavior:
People are more likely to share when they feel they’re giving, not taking.
Why Does Altruism Win?
- It feels good: Altruism taps into intrinsic motivation. People love the idea of helping friends.
- It reduces friction: Giving feels less “salesy” than getting rewarded.
- It builds trust: A friend is more likely to try something if they feel it’s a gift, not a transaction.
This doesn’t mean self-interest doesn’t work — it does, especially in certain markets. But for broad, scalable growth, altruistic framing often drives higher engagement, more clicks, and more successful referrals.
If you’re building a referral program for your SaaS, marketplace, app, or e-commerce brand, this test serves as a simple but powerful reminder:
How you communicate value matters as much as the value itself.