I doubt Adyen is well known among North Americans either (the first market being rolled out for ebay). Ayden is used by Uber and Netflix and some other big names but that's mostly hidden in the background as they are integrated directly into the platforms. Unlike Paypal which has an obvious branded layer for all transactional layers.

I'm curious what the integration with Ebay will look like. Will users be redirected to their Ayden accounts ala Paypal or will it be branded via Ebay?