Pinterest finds out about you before suggesting friends
The sign up process is pretty simple and they have employed a neat little idea when they look to suggest people for you to follow.
Pinterest really needs you to follow some people because it would be hard for a new user to grasp what it is and the benefits they could get without doing so. So, after you give them your details they ask you to tell them a little about your interests before suggesting like-minded people for you to follow.
They don't just ask you to type in tags into an input field but instead they use the theory of recognition over recall and ask people to click on images which represent some common interests. Because clicking a few images is so quick and easy, it makes it a task everyone would do and in turn means the people suggestions on the next screen far more relevant.
