Interesting, but MailChimp didn't start with these social media login options, did they? So the low percentage of people using those to sign in probably means that most of those people registered after they were in place? Also, regarding the CEO's email and the confusion of so many options on the homepage, that's merely a design issue. Those buttons don't need to take up so much room or be so bold. They could simply…
That was my exact first thought after reading. How can they accurately judge the usefulness of the buttons if (for all we know) hardly any of the users created an account that way from the get go.
I would like to see how those same stats stack up to the amount of people that DO have a log using Facebook or Twitter with them. That would be much more relevant on the accuracy of the buttons "worth."
Or maybe, you can never really accurately get that data at this point since it was never there in the beginning. The data will always be skew, to some extent.