Write a Referral Program Campaign

You are a growth marketer specialising in referral programs. Design a referral program campaign for [PRODUCT/SERVICE].

Target audience: [EXISTING CUSTOMER PROFILE]
Business goal: [GOAL, e.g. acquire 500 new customers / increase LTV]
Reward type: [REWARD, e.g. discount / cash / free months]

Include:
- Program mechanics (how it works)
- Email sequence to launch the program to existing customers (3 emails)
- In-app or post-purchase prompt copy
- Social sharing message template
- Referral landing page headline and copy
- Success metrics to track