Every major online marketplace tells some version of the same origin story: modest fees, generous terms, and a promise that success would be shared fairly between the platform and the people selling on it. Two decades into the platform economy, that promise has aged unevenly. Take rates — the cut a marketplace keeps from every transaction — have climbed steadily across categories, and sellers who once saw the platform as a growth partner increasingly describe it as an unavoidable toll booth.
The mechanism behind this is straightforward once you see it. A marketplace's value to a seller comes from the buyers it can reach that the seller couldn't reach independently. Early on, when a platform is still building that reach, it needs sellers more than sellers need it, so fees stay low and terms stay generous. Once the audience is built and switching to a competitor means abandoning years of reviews, rankings, and repeat customers, the leverage flips. The platform can raise fees, and most sellers will pay rather than start over somewhere with less traffic.
The lock-in nobody signed up for
What makes this dynamic hard to escape is that it doesn't rely on any single anti-competitive decision. No seller agreed to become dependent on one platform; it happened gradually, sale by sale, as the cost of building an independent audience stayed high while the convenience of the existing one kept compounding. By the time fee increases arrive, most sellers have too much sunk into their standing on the platform to walk away over a few additional percentage points.
Platforms know this, and their fee schedules reflect it. Increases tend to arrive as a patchwork rather than a single visible hike — a new payment processing charge here, an advertising fee that's nominally optional but functionally required to stay visible there, a shipping or fulfillment surcharge bundled into a "convenience" service. Sellers rarely experience one dramatic price change; they experience a slow accumulation of smaller ones that's much harder to organize against.
No seller agreed to become dependent on one platform. It happened gradually, sale by sale, until leaving became more expensive than staying.
Where the pressure shows up
The clearest evidence of rising take rates isn't in what platforms disclose voluntarily — it's in seller behavior. Multi-homing, where a merchant lists the same inventory across several marketplaces to avoid depending on any one of them, has become close to standard practice for sellers with the operational capacity to manage it. Smaller sellers, who can least afford the overhead of running multiple storefronts, are the ones most exposed to fee increases with the fewest options to respond.
Regulators in several markets have started treating this dynamic as a competition issue rather than simply a pricing one, scrutinizing whether platforms use their control over search ranking and visibility to effectively force sellers into fee structures they'd never accept as a standalone price. Whether that scrutiny produces meaningful rule changes or simply becomes background noise that platforms route around is one of the more consequential open questions in platform economics right now.
What sellers are doing about it
The more sophisticated response isn't leaving platforms — for most categories, the audience concentration makes that impractical — but building owned channels alongside them: an email list, a direct website, a loyalty program that survives independently of any single marketplace's algorithm. None of these fully replace platform reach, but they shift some leverage back toward the seller by giving them a way to reach customers the platform doesn't fully control. It's a slower, less glamorous strategy than the platform-native growth playbook of the last decade, but it's increasingly the only one available to sellers who want negotiating power the next time fees go up.
