Marketplaces are seductive because the demand is already there. List a product, and traffic shows up without the customer acquisition cost of building your own storefront. That ease is exactly why so many brands over-rely on them and end up with almost no pricing control left by the time they realize it.
The Data You Don't Own
The core problem with marketplace-first strategy is data ownership. You don't get the customer's contact information, their repeat purchase behavior beyond what the platform shows you, or the ability to market to them directly outside the platform's own advertising system. I treat every marketplace sale as a transaction, not a relationship, because that's structurally what it is.
That's not a reason to avoid marketplaces. It's a reason to make sure they're one channel in a mix, feeding a portion of volume, while direct channels and wholesale relationships where you do own the customer relationship carry the strategic weight of the business.
Price Discipline Across Channels
The other discipline marketplaces demand is strict price parity management. Letting marketplace pricing drift below your direct or wholesale pricing trains customers to shop the cheapest channel and undermines every other relationship you've built. I set minimum advertised pricing policies and enforce them on marketplace sellers and resellers alike, because one undisciplined reseller racing to the bottom on a major marketplace can erode brand positioning across every channel simultaneously.
Marketplaces are useful for liquidation of excess inventory, for testing new SKUs with minimal setup cost, and for reaching customers you wouldn't otherwise find. They're a poor foundation for a brand that wants to own its customer relationships and control its own pricing long term.