Spot the Trap: Teardown of Two Marketplace Launch Plans
Objective: Review two synthetic marketplace launch plans for a resale-apparel platform, find the cold-start and monetization defects each one hides, and separate real defects from plausible-sounding but acceptable choices.
You're reviewing two draft city-launch plans for ThredUp's resale marketplace before either gets approved for budget.
Read each plan, identify the defects using the lesson's Cold-Start Problem and Monetization Models sections, and don't flag every unconventional-sounding choice as a mistake, some are legitimate tradeoffs.
Before you start
What you'll need
Free path (everything below is enough to finish)
Free, sufficient for a structured 2-plan review log
The process
Specimens to review
Identify the defects in Plan A. Not every unusual choice below is wrong, at least one line is a reasonable early-stage tactic, not a mistake.
PLAN A: Seller Growth Sprint Week 1-4: Offer sellers a guaranteed $15 payout per Clean Out Kit regardless of what sells, to maximize inventory volume fast. Week 5: Launch a buyer discount code (40% off first order) to clear the new inventory quickly. Week 6: Take a 5% platform fee on all transactions starting immediately to fund the next city's launch. Success metric: total items listed by week 6.
Specimen: synthetic, realistic
Identify any defects in Plan B. This plan is deliberately close to the lesson's recommended playbook, look carefully for what, if anything, is actually wrong versus what just looks unconventional.
PLAN B: Single-Player Seller Tools First Month 1: Launch free listing photography and pricing-suggestion tools for sellers, no fee, no buyer marketing yet. Month 2: Once 500+ quality listings exist in the city, launch buyer acquisition via paid social and SEO content. Month 3: Introduce a 4.5% seller-side transaction fee, positioned as covering payout processing and buyer trust guarantees. Success metric: listing-to-sale conversion rate by month 3, not raw listing count.
Specimen: synthetic, realistic
Final deliverable
A defect log for both plans with severity ratings, plus a one-line approve/hold recommendation for each.
See a reference example
Rent the Runway plan-review log (excerpt, different plan) Plan X: HOLD, critical defect, monetization turned on before liquidity confirmed. Plan Y: APPROVE, sequencing matches seed-supply-first playbook, no critical defects found.
Success criteria
You're done when you can:
- Flags Plan A's early monetization as the critical defect
- Correctly identifies Plan B as matching the lesson's playbook rather than inventing a defect for it
- Does not flag the week 1-4 seller subsidy in Plan A as itself the defect