Marketplaces Are Not a Growth Machine

Large marketplaces are excellent distribution channels and poor growth engines, and the difference matters because the two get treated as the same thing. Distribution moves existing demand to a sale. Growth creates demand that did not previously exist and attaches it durably to a brand. A marketplace is very good at the first job and structurally unable to do the second, because the customer relationship and the purchase data it generates belong to the platform, not the seller.

What marketplaces genuinely do well

Before the critique, the case for marketplaces on its own terms. They solve trust at a speed no new brand can match on its own: a shopper who has never heard of a seller will still buy, because they trust the platform’s return policy and payment protection more than they trust the seller. They solve logistics, often completely, handling storage, fulfillment, and customer service at a cost and reliability a small brand could not build alone. And they put a product in front of people who are already searching to buy something in that category, which is about as high-intent a moment as commerce offers.

These are real advantages, and for products entering a crowded category with no existing audience, they can be the difference between getting any sales at all and getting none. None of what follows is an argument that marketplaces are bad. It’s an argument that they answer a different question than growth does.

Why harvesting demand isn’t the same as creating it

A shopper who searches a marketplace for a product category was already going to buy that category of product from someone. The marketplace’s job, and it does this job well, is winning that already-existing intent for whichever seller ranks best in that moment: price, reviews, delivery speed, ad placement within the platform. That is real revenue, and it is also revenue the brand didn’t create. It captured demand that existed independently of the brand’s own marketing, and it will just as readily route that same demand to a competitor next time if the competitor ranks better.

Growth, in the sense that builds a durable business, is demand a brand generates on its own: a customer who searches your brand name specifically, who buys again because they remember you, who tells someone else about you by name. That kind of demand doesn’t need to win a ranking algorithm each time, because it’s directed at the brand rather than at the category. A marketplace has little mechanism for building this, because the buyer’s attention and repeat behavior stay inside the marketplace’s own ecosystem, not the seller’s.

The data and relationship problem

The sharper version of the same point: marketplaces typically limit or withhold the buyer’s contact information, browsing history, and repeat-purchase behavior from the seller. A brand selling on its own site can build a customer list, run retargeting, measure customer awareness stages, and improve contribution margin per customer over time as repeat rate compounds. A brand selling primarily through a marketplace often cannot do any of this, because the party with the data is the platform, not the brand.

This is not a minor operational inconvenience. It means the brand cannot compound its own acquisition spend into a growing asset. Every sale is closer to a one-off transaction than to the start of a relationship, and the economics of the channel stay flat over time instead of improving as the brand’s data and reputation with its own customers grow.

A decision rule for allocating between channels

Marketplace revenue is worth pursuing when it earns money at acceptable margin and doesn’t crowd out the harder, slower work of building direct demand. It becomes a problem when it becomes the majority of revenue and the brand has no independent acquisition motion of its own, because at that point the brand has no leverage: it is a supplier to the platform’s customers, not the owner of its own.

A useful threshold: if more than roughly half of revenue comes through a marketplace and direct-channel acquisition spend has been flat or shrinking for two consecutive quarters, the brand is optimizing for the platform’s growth, not its own, and should treat that as the priority to fix before scaling marketplace presence further.

When this does not apply

Some categories genuinely are marketplace-native: commodity goods bought on price and speed, where brand loyalty is rare regardless of channel. For those categories, chasing a direct relationship the customer doesn’t want to have is wasted effort, and marketplace distribution is close to the whole strategy, honestly assessed.

Marketplaces are a legitimate and often necessary channel. What they are not is a substitute for building demand a brand can call its own, and the businesses that eventually run into trouble are the ones that never noticed the difference until the platform changed a fee or a ranking rule and took the growth with it.