Online marketplace behemoth eBay said it plans to no longer accept American Express, citing what the company says are “unacceptably high fees” and that customers have other payment options to shop online.

It’s a notable blow to American Express, whose customers are often the most attractive among merchants and spend the most money per month on their cards. But it’s not the first time merchants have voiced opposition to AmEx’s business practices by walking away, most notably warehouse chain Costco nearly a decade ago.

“After careful consideration, eBay has decided to no longer accept American Express globally effective Aug. 17 due to the unacceptably high fees American Express charges for processing credit card transactions,” said eBay spokesman Scott Overland, in a statement.

Boeing launched astronauts for the first time Wednesday, belatedly joining SpaceX as a second taxi service for NASA.

A pair of NASA test pilots blasted off aboard Boeing’s Starliner capsule for the International Space Station, the first to fly the new spacecraft.

The trip by Butch Wilmore and Suni Williams was expected to take 25 hours, with an arrival Thursday. They will spend just over a week at the orbiting lab before climbing back into Starliner for a remote desert touchdown in the western U.S. on June 14.

Wednesday’s launch was the third attempt with astronauts since early May, coming after a pair of rocket-related problems, most recently last weekend. A small helium leak in the spacecraft’s propulsion system also caused delays, but remained extremely low and manageable.