The two companies have been negotiating merchant discount rates — otherwise known as interchange fees — that Amex charges at the point of sale. The fees are charged each time a card is used and can add up, with one trade group saying card processing fees cost retailers more than $172b in 2023.
“At a time when payment processing costs should be declining because of technological advancements, investments in fraud capabilities and customer protections by merchants like eBay, credit card transaction fees continue to rise unabated because of a lack of meaningful competition,” eBay said.
https://www.pymnts.com/credit-cards/2024/ebay-cutting-amex-ties-over-card-fees/