A mobile gaming company is designing a referral program and is considering various incentive structures. Evaluate the proposed incentive strategies and determine which align with effective practices for designing referral program incentives:
- Strategy A: Offering an immediate small amount of in-game currency to both the referrer and the referee upon successful referral.
- Strategy B: Providing a significant one-time discount on in-game purchases for the referrer only after their fifth successful referral, to ensure everyone refers at least 5 people.
- Strategy C: Implementing a tiered reward system where rewards increase with the number of successful referrals, applicable to both referrer and referee.
Select the strategy(ies) that demonstrate effective practices in designing referral program incentives: