An online fitness platform is conducting experiments to optimize its referral program. They have implemented several variations of referral incentives and messaging. Evaluate the effectiveness of these experiment strategies:
- Experiment A: Testing two different email messages with the same referral incentive to see which achieves a higher open rate and referral participation.
- Experiment B: Simultaneously changing the referral reward and the platform’s user interface to see which combination increases the K-factor.
- Experiment C: Offering a tiered referral incentive, where rewards increase with the number of successful referrals, and measuring the change in the K-factor.
Determine which experiment strategy(ies) align with effective practices in testing referral programs: