Digital MarketingIntermediate 2 to 3 hours

Design a Referral Programme

Design a two-sided referral programme and model the viral coefficient.

The Scenario

A South African online banking app wants to reduce their customer acquisition cost (currently R180 per customer via paid ads). They believe a referral programme could acquire customers for under R80 each.

The Brief

Design a complete referral programme. Define the incentive structure for both sides (referrer and referee), calculate the viral coefficient, and project the impact on monthly growth.

Deliverables

  • The incentive structure: what the referrer gets, what the referee gets, and when each reward is triggered
  • A viral coefficient calculation: invites per user × conversion rate = K-factor, with realistic assumptions
  • A 6-month growth projection comparing organic growth vs organic + referral growth
  • One anti-fraud mechanism to prevent referral abuse

Submission Guidance

A K-factor above 1.0 means viral growth. Most referral programmes achieve 0.2-0.5. Be realistic about your assumptions.

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