My bad, that was not linked to the original presentation, but to the single quote on a website for quotes. I wasn't aware they required login though, that's really bad and goes against what I think is greatest in the web (that is, apps that let you get using them without even identifiying yourself, and sign up only later if you want).

However your criticism is still spot on, since the website (changemakrs.com) is a fine example of great visual design following all latest trends of minimalistic and big type, as in the slides, but a poor example of usability design indeed. Thanks for the heads up, I'll refrain from linking quotes through them until it's made more accessible.