Frequently asked questions

What makes the dual-tier reward structure effective?
It incentivizes both the referring subscriber (with +5% exclusive savings) and the referred friend (with base discount), creating mutual benefit that encourages participation from existing customers seeking additional rewards.
Why does Casper emphasize subscriber-exclusive benefits in this email?
Highlighting the +5% tier reserved for subscribers only strengthens customer retention by rewarding loyalty while creating urgency for non-subscribers to upgrade to unlock additional referral savings.
Is this referral structure reusable for other products?
Yes, the tiered mechanics are scalable across any repeat-purchase category—the percentage discount and reward layers can adjust while maintaining the dual-incentive structure that drives both retention and acquisition.
How does word-of-mouth acquisition improve customer lifetime value?
By combining discounts with referral mechanics, the email turns existing customers into acquisition channels, building customer lifetime value through both repeat purchases and low-cost organic growth from referred friends.