A marketplace fee is easy to understand when a seller joins.
The harder question comes later: what happens after the shop has spent years becoming valuable inside that marketplace?
Etsy supplied a clean example in 2022. The company announced that its transaction fee would rise from 5% to 6.5% beginning April 11, 2022. Etsy said the additional revenue would support marketing, customer support, seller tools, and marketplace safety.
The announcement remains in Etsy’s Seller Handbook, and Etsy separately confirmed that the new 6.5% rate applied to the total order amount.
A percentage increase compounds with the business
For a shop doing $1,000 in fee-applicable sales, the difference between 5% and 6.5% is $15.
At $10,000, it is $150.
At $100,000, it is $1,500.
That does not mean the fee increase was unjustified. Etsy argued that spending more on buyer acquisition, support, and enforcement would improve the marketplace for sellers. A larger marketplace can provide more value than a cheaper one with no customers.
But percentage fees have an interesting property: the more successful the merchant becomes, the more expensive the platform becomes in absolute dollars.
The seller is not starting from zero somewhere else
An established Etsy shop may have years of reviews, favorites, search placement, returning buyers, listing history, and links from elsewhere on the web.
Those assets are not completely portable.
A seller can open an independent storefront or move to another marketplace, but the new location does not inherit the old reputation graph. Customers must be taught where to go. Search visibility has to be rebuilt. Reviews may remain behind.
That makes a fee increase different for an established merchant than for someone deciding whether to open a shop today.
The new seller can simply reject the deal.
The established seller has to price the cost of leaving.
The correct comparison is fee versus supplied value
It is tempting to look at any marketplace fee increase and call it extraction.
That is too simple.
If a platform raises fees and delivers proportionally better fraud protection, support, advertising, conversion, payment handling, or buyer traffic, a seller may still come out ahead.
The useful question is whether the incremental value keeps pace with the incremental cost.
Etsy said its 2022 increase would fund more marketing, a support-team expansion, enforcement work, and seller tools. Sellers could then judge whether those improvements were worth another 1.5 percentage points on transactions.
That is the broader lock-in pattern to watch.
A platform first becomes useful enough for businesses to build around it. The businesses accumulate platform-specific history. Only then does changing the fee become especially powerful, because the alternative is no longer merely “use a competitor.”
It is “rebuild part of the business somewhere else.”