referral-program

# Referral Program

Production-grade referral and affiliate program framework covering the 4-stage referral loop, incentive design methodology, trigger moment optimization, share mechanics, viral coefficient modeling, affiliate program architecture, and systematic optimization playbook. Designed to build programs that compound, not collect dust.

## Use when

- The user asks to "design a referral program", "launch an affiliate program", or "improve viral growth"
- The decision between customer referral vs affiliate program needs to be made
- An existing referral program has stalled (K-factor <1, low share rate, low referred-user conversion)
- Reward structure needs sizing against CAC, margin, or LTV
- Trigger moments need to be identified (when to ask, which in-product events, which lifecycle emails)
- The user says "word-of-mouth isn't working" or "we want to add a refer-a-friend flow"

---

## Table of Contents

- [Referral vs Affiliate Decision](#referral-vs-affiliate-decision)
- [The 4-Stage Referral Loop](#the-4-stage-referral-loop)
- [Incentive Design](#incentive-design)
- [Trigger Moment Architecture](#trigger-moment-architecture)
- [Share Mechanics](#share-mechanics)
- [Referred User Experience](#referred-user-experience)
- [Viral Coefficient Modeling](#viral-coefficient-modeling)
- [Affiliate Program Framework](#affiliate-program-framework)
- [Optimization Playbook](#optimization-playbook)
- [Metrics and Benchmarks](#metrics-and-benchmarks)
- [Program Copy Templates](#program-copy-templates)
- [Output Artifacts](#output-artifacts)
- [Related Skills](#related-skills)

---

## Referral vs Affiliate Decision

| Factor | Customer Referral | Affiliate Program |
|--------|------------------|-------------------|
| Who promotes | Your existing customers | External partners, bloggers, influencers |
| Motivation | Loyalty, reward, social currency | Commission, audience monetization |
| Best for | B2C, prosumer, SMB SaaS | B2B SaaS, high LTV, content-heavy niches |
| Activation | Triggered by product satisfaction | Recruited and onboarded proactively |
| Payout | Account credit, discount, or cash reward | Revenue share or flat fee per conversion |
| CAC impact | Low -- reward is typically < 30% of first payment | Variable -- commission determines economics |
| Scale | Scales with active user base | Scales with partner recruitment |

**Decision rule:** If your customers are enthusiastic and social, start with customer referrals. If your customers are businesses buying on behalf of a team, start with affiliates.

---

## The 4-Stage Referral Loop

Every referral program runs on this loop. If any stage is weak, the entire program underperforms. Work the stages in order — a broken Stage 1 (trigger) can't be fixed by better rewards at Stage 4.

```
[Trigger Moment] → [Share Action] → [Referred User Converts] → [Reward Delivered] → Loop
```

- *Validate Stage 1:* trigger fires on a real satisfaction event, not at signup or in a generic monthly email
- *Validate Stage 2:* share friction is <3 taps/clicks and pre-filled copy is channel-specific
- *Validate Stage 3:* referred user lands on a referral-specific page, not the generic homepage
- *Validate Stage 4:* reward delivery is automatic and notified (manual reward ops kill the loop)

### Stage 1: Trigger Moment

When you ask customers to refer. Timing is everything.

**High-signal trigger moments:**

| Trigger | Why It Works | When to Fire |
|---------|-------------|-------------|
| After aha moment | User just experienced core value, highest satisfaction | After activation event |
| After milestone | Celebrates achievement, creates social sharing impulse | "You just saved your 100th hour" |
| After great support | Gratitude creates sharing impulse | Post-resolution, NPS 9-10 |
| After renewal/upgrade | Commitment signal, satisfied customer | Day of renewal |
| After public win | Customer tweets about you or posts a case study | Within 24 hours |
| After team growth | New team members = new potential referrers | After Nth team member joins |

**What does NOT work:**
- Asking at signup (no value experienced yet)
- Asking in every email footer (becomes invisible)
- Asking during onboarding (too early, too distracted)
- Generic monthly "refer a friend" email (no trigger, no urgency)

### Stage 2: Share Action

Remove every point of friction between wanting to share and actually sharing.

**Required share mechanics:**
- Personal referral link (unique per user, trackable)
- Pre-filled share message (editable, not locked)
- Multiple share channels: email invite, link copy, social share
- For B2B: Slack/Teams share option
- One-click send on mobile (native share sheet)

**Share message rules:**
- Written in first person (sounds like it is from a friend, not marketing)
- Includes the specific benefit the referrer experienced
- Short (2-3 sentences max)
- Includes the referral link with clear CTA

### Stage 3: Referred User Converts

The referred user lands on your product. Their experience must:

- Show personalization: "Your friend [Name] invited you"
- Display the incentive clearly above the fold
- Reduce signup friction (pre-fill email if available, offer SSO)
- Track attribution from landing through conversion (multi-session)

### Stage 4: Reward Delivered

The reward must be fast and clear. Delayed rewards break the loop.

| Action | Implementation |
|--------|---------------|
| Immediate confirmation | "Your friend just signed up! Here's your reward" |
| In-product visibility | Dashboard: "2 friends joined -- you've earned $40" |
| Email notification | Instant notification when referral converts |
| Easy redemption | Auto-applied credit or one-click claim |

---

## Incentive Design

### Single-Sided vs Double-Sided

| Type | When to Use | Cost | Conversion Impact |
|------|-------------|------|------------------|
| Single-sided (referrer only) | Strong viral hooks, enthusiastic users | Lower | Moderate |
| Double-sided (both get rewarded) | Need