For me the most important bit in that was the last line. "Is it worth it? Nope, it’s not to us ." (my emphasis) Not all businesses are the same. B2B businesses like MailChimp usually don't see major increases in value through third party auth. They're providing serious value. People will go to the effort regardless. With a casual use B2C site removing even the tiniest piece of friction in the login process can mean t…
Yes, which makes it particularly annoying when a website advertizes sign-up via social network only to immediately follow this sign-up with its own registration form, making the social network signup stage an additional stage in signing up, rather than a substitute.