[synx508]

Ebay used to have some rich pre-registration features like "watching", but they seem to have been removed in the last year or so. They still track logged-out profiles and tease a login with items that "you might like" and recent search lists. These hang around for years, I expect somewhere in Ebay Towers there's a top ten list of the Ebay identity that has been spread most widely across devices/browser profiles.