Problem
Scenario
You're advising a product team that sees strong user growth from referrals, sharing, and participation rewards. Leadership wants to know whether the loop is creating real user-to-user value that compounds over time, or whether growth is mostly being bought through incentives that may fade if rewards are reduced.
Question
How would you evaluate whether a product's growth loop has network effects or just incentives?
What to Look For
- Does the product become more useful as more relevant users join?
- Does retention improve for existing users as network density rises?
- Does growth persist when incentives are reduced or removed?
- Are users inviting others for product value or for rewards?
Representative Context
A useful way to ground this is a marketplace or social product with a referral loop, such as a16z's Speedrun founder community tools or portfolio support surfaces where users invite peers, share content, or join collaborative workflows. The core strategic question is whether each added user increases utility for others, or whether the loop only works while subsidies are active.
Practicing as: Product Growth Analyst interview at Andreessen HorowitzHi, I'll play your Andreessen Horowitz interviewer for the Product Growth Analyst role. Candidates describe these interviews as mixed and moderately difficult, so expect me to be professional and fair. Take your time with the question above and answer like we're in the room.
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