At this stage, people who arrive at Pinterest's signup page already know what they're getting themselves into. The word-of-mouth factor is massive. A new user h

At this stage, people who arrive at Pinterest's signup page already know what they're getting themselves into. The word-of-mouth factor is massive. A new user has heard from her friend how great the site is. She's not going to be daunted by signup flow that has a modal you can close, or whatever else your post was about. You've missed the point entirely.