The difference is that 0.5% on the whole payment, might in some cases be actually much more than taxes on the profit. Or even worse, if you sell for whatever reason without profit, the tansaction fee is your loss.

Standard VAT in Poland is 23% so taxes usually dwarf fees.

0.5% gross on a 1% margin business (which is most retail) is egregious.

I would like to know where that 1% retail business is located. My family has a bunch of hardware/electricity retail businesses and the margins are way more than that. Like 30%-500%.

Groceries and fuel come to mind.

You mean subsidized wares that is priced for loss to lure masses to cheap shopping, while selling other stuff above the price? Like buying liquors like rum and whiskey in european supermarkets is almost guaranteed to give cca 2x the price of cheapest online sellers in same country. Thats age old tactic, you need to look at overall sums spent or prices across the offer

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[1]: https://mlsync.ai

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[1]: https://mlsync.io

MLS Listing powered AI Search and Agent is live as mlsync.ai [1].

[1]: https://mlsync.ai