"Adyen’s business is solely focused on providing back-end payments services, like credit card processing, to businesses, so you won’t see any Adyen payment buttons pop up on eBay. But Adyen will become the primary payments processor for eBay sites across the world.
After the existing eBay-PayPal agreement ends in 2020, PayPal will remain a payment option for shoppers on eBay, but it won’t be prominently featured ahead of debit and credit card options as it is today. PayPal will cease to process card payments for eBay at that time."
https://www.recode.net/2018/1/31/169...ents-agreement