Design a Referral Program

Design a customer referral programme for [COMPANY/PRODUCT].

Context:
- Product: [WHAT IT IS]
- Existing customer type: [WHO THEY ARE]
- Typical customer LTV: [VALUE IF KNOWN]
- Budget for rewards: [APPROX BUDGET OR PERCENTAGE]

Deliverables:
1. Programme structure — incentive for referrer and referee, how it works, how to track
2. Email to existing customers launching the programme (150 words)
3. In-app or post-purchase referral prompt copy (3 variants — button text + one-line message)
4. Social sharing copy template customers can use

Make the incentive feel generous and the mechanics simple. Avoid complex multi-tier structures.