Which Side Do You Seed First? Auditing a Marketplace Launch Plan
Objective: Given a scenario describing a new fashion-rental marketplace's supply (designer inventory) and demand (renters) constraints, apply the lesson's seed-first decision table to choose which side to seed and justify it.
You're a marketplace strategist at Rent the Runway, planning the launch of a new city market where designer brand partnerships are hard to close but renter sign-ups are cheap to acquire via paid social.
Use the lesson's seed-first decision table to determine which side is the actual bottleneck, then write a one-paragraph justification a designer-partnerships lead could act on.
Before you start
What you'll need
Free path (everything below is enough to finish)
Free, fast enough for a 2-row structured decision
The process
1 step
Step 01 of 01
The lesson's decision table says: if supply is scarce or hard to recruit, seed supply first, because demand won't show up if there's nothing to rent.
Designer brand partnerships take 6-10 weeks to close and require inventory commitments. Renter sign-ups convert in days via paid social. Which side is the real launch bottleneck?
Procedure
- List supply (designer inventory) and demand (renters) as two rows
- Fill in time-to-acquire and acquisition cost for each
- Answer: would renters sign up with an empty closet of inventory? Would designers commit inventory with zero renters?
- Apply the decision table: seed the scarce, slow-to-recruit side first
Side, Time to Acquire, Cost, Shows up without the other? Supply (designers), 6-10 weeks, High (inventory commitment), No, renters need selection Demand (renters), Days, Low (paid social), No, but cheap and fast to refill
Healthy
Recognizing that fast, cheap acquisition on one side doesn't matter if the slow side is what actually gates launch.
Unhealthy
Launching a renter acquisition campaign before enough designer inventory exists to fill it.
What this means
Supply is the scarce, slow-to-recruit side here, exactly the pattern the lesson flags as 'one side is also the product' since designer inventory IS what Rent the Runway sells.
So what do I do about it?
| Symptom | Action | Effort |
|---|---|---|
| Marketing wants to run a renter acquisition campaign before launch | Delay the demand campaign until a minimum viable designer catalog is locked in for the city | 30 min |
Final deliverable
A one-paragraph seed-first recommendation with the comparison table backing it.
See a reference example
ThredUp new-market launch memo (excerpt) Seed supply first. Seller onboarding (Clean Out Kits) takes 2-3 weeks to convert into listable inventory, while buyer acquisition converts same-day via paid social. Hold buyer-acquisition spend until the market has enough listed inventory to support first-session conversion.
Success criteria
You're done when you can:
- Correctly identifies designer supply as the scarce, slow-to-recruit side
- Recommends delaying demand-side spend until a minimum inventory threshold exists