Fitment is the whole game for the race-shop catalogues north of the city, and a marketplace changes the format without changing the problem. On your own store, compatibility lives in metafields you designed and can fix in an afternoon. On a marketplace it lives in a standardised vehicle dataset submitted to the platform's part finder, in a schema you do not own, validated by rules you cannot see. Get it wrong and you do not simply lose a sale — you take the return, the freight both ways, and a return-rate metric that will eventually suppress the listing. The efficient version is to clean the underlying data once and publish it into each format, rather than maintain three drifting copies.
For the mills and hosiery firms selling under their own name after decades of contract work, the marketplace is a faster and more brutal education than a wholesale rep ever gave them. It will tell you within a quarter what your brand is worth without a customer's label on it. It will also charge apparel one of the steeper referral rates on the platform, hand you the category's return rate, and put a private-label competitor in the carousel under your own listing. That does not make it wrong. It makes size charts, variation parentage by colour and size, and honest fit content the difference between a channel and an expensive experiment.
And for a good number of Charlotte catalogues the honest answer is that the marketplace slice is small. Beer, cider and spirits are closed to third-party sellers on every marketplace that matters here — Amazon runs no general alcohol programme a seller can apply into, and TikTok Shop and Walmart Marketplace prohibit it outright — so that revenue stays on your store behind state-by-state shipping rules. Made-to-order and freight-class furniture belongs on your own freight rating, not in a fulfilment network priced for parcels. What is left is usually a defined set of accessories, consumables, spares and boxed goods — and we would rather scope that accurately, with the fee math attached, than open five channels because the deck looked better with five logos on it.