Audit marketplace supply growth across five core levers

Marketplace Supply Has Five Levers and Most Teams Pull Two

When demand is outpacing supply, the easy move is to spend on supply acquisition: paid referrals, channel partnerships, signup bonuses. The cheaper move is usually one of the four other levers (activation, capacity, retention, density), but those levers are invisible if the team has not separated them. The audit forces the separation so the team knows which lever is binding and which one will produce the next 10 percent of supply growth.

Andrew Chen's writing on marketplaces frames the central insight: supply is rarely a single problem. It is five problems with shared symptoms. A marketplace that looks supply-constrained may actually be capacity-constrained (existing supply could serve 30 percent more if the bottleneck were removed) or density-constrained (supply exists but not where demand is).

The five levers

• Acquisition. Channels that bring new providers into the marketplace. CAC per active provider, channel ceiling, drop-off through the signup funnel.
• Activation. The path from signup to first transaction. Most marketplaces lose 40 to 70 percent of registered supply before first revenue.
• Capacity. How much each active provider serves. Top providers do 5 to 10x the median; raising the median is often cheaper than acquiring new providers.
• Retention. How many providers are still earning at month 6 and month 12. Churn drives the supply hole the acquisition team is paid to fill.
• Density. The geographic or category supply needed for liquidity. A national average that looks healthy can hide cities where density is too low to convert demand.

First Round Review collects deep operator writing on marketplace dynamics, including the recurring observation that liquidity is local and density-dependent.

How the Audit marketplace supply growth prompt works

Step 1 maps demand to supply. The team picks 5 cities or segments and quantifies demand, supply, and liquidity. Gaps over 25 percent at the match-rate level mark the targets for the audit. Without this map, levers are pulled at a national average that hides the real local imbalances.

Step 2 audits acquisition. The number that matters is CAC per active provider, not CAC per signup. Channels that produce many signups but few activated providers are inflating the supply graph without inflating revenue.

Step 3 audits activation. Percent reaching first transaction within 14 days, single biggest drop-off step, the 1-2 actions that correlate with surviving past month 3. Amplitude's writing on activation applies on the supply side too: an unactivated provider is not yet supply.

Step 4 audits capacity. Demand-driving-supply only compounds if active providers can serve more demand. The audit measures orders per active provider per week, the distribution between top, median, and bottom quintile, and the operational bottleneck (scheduling, tools, payments, customer access) that prevents the median from rising.

Step 5 audits retention. Six-month and twelve-month retention by cohort, churn reasons categorized, the interventions that moved the number in the last four quarters. Retention compounds; a 10 percent improvement in 12-month retention can equal an entire quarter of acquisition spend.

Step 6 audits density. Supply per square mile or per category that is required for liquidity. Cities below the threshold need investment; cities above are at risk of over-supply that pushes per-provider earnings below their reservation wage.

Step 7 picks the binding lever. The team estimates the marginal supply unit per dollar invested for each lever over the next 90 days. The winner is the lever with the best math at current scale, the strongest loop (today's growth makes tomorrow's growth cheaper), and the team capacity to execute.

Why most teams default to acquisition

Acquisition is visible. A new channel goes up and to the right or it does not. Activation, capacity, retention, and density show their value over months, and the wins are easy to attribute to other things. The audit forces a comparison so the visible lever is judged against the levers that actually compound.

SVPG's writing on empowered teams emphasizes the same broader point: teams that pull the most visible lever tend to under-invest in the levers with the highest long-run leverage.

When to use it

• Demand is outpacing supply and the team has been hammering acquisition without a clear ROI trend.
• A new geography is launching and the team needs to know whether density is achievable before committing to acquisition spend.
• Supply churn has been climbing and acquisition CAC is rising in parallel.
• A marketplace has reached the end of the easy acquisition channels and needs to find growth elsewhere.
• A new marketplace lead is joining and wants a structural audit before committing to a quarterly plan.

Common pitfalls

• CAC per signup, not per active provider. Signups are not supply. Measure CAC against the activated provider.
• National averages. Liquidity is local. National numbers hide the cities where the math is broken.
• Ignoring capacity. The cheapest supply growth is often raising the median throughput of existing providers.

Sources

• Andrew Chen on marketplaces - Andrew Chen
• First Round Review - First Round
• Activation rate primer - Amplitude
• SaaS metrics - Amplitude
• Empowered product teams - Silicon Valley Product Group