https://www.swisstypefaces.com/news/2017/6/1/ebay-typeface/

We worked with the eBay brand team and the New York based design agency Form&. Market Sans’ style came from the Capital typeface, a font from our Lab department. eBay bought the exclusive rights for developing a complete font family and taking it out of the market. This typeface was a fusion between the neo-grotesque style of the Suisse Int’l and the geometric shapes of the Euclid Flex typeface. Market Sans is a brand-new family including six weights with italics.