I'm trying to figure out how Feedly does their login with Google link. Based on the redirect URL it passes I'd think it was a google service, but at the same time, the login page says it's not associated "Note: Google is not affiliated with feedly. Your password will not be shared with the feedly service".
Anyone know what exactly powers this? Is it Federated login with some special domain trickery allowing them to upload a site screenshot and description? Or is it something else.