I really dislike this direction of sites forcing you to sign up using social auth/the credentials for another service. I understand the benefits from the site's perspective, in particular limiting spam accounts and ensuring that accounts are tied to real-world persons. But I am way less likely to use your site if you don't let me choose if I want to give you unnecessary data about me.
This is super cool! However I tried to access the 'About' link in the footer, and the infinite-scroll makes it almost impossible to click. Might want to change the footer!