Ready pointed to Australia’s ban on social media for youth under 16 as a model. A company spokesperson declined to comment on the post and whether the CEO believes the company’s site or app would be included in the ban. Users must be 13 to sign up for a Pinterest account in the US, according to the company’s website. Under the terms of Australia’s ban, teens under 16 are allowed to create Pinterest accounts, giving the company a regulatory edge over larger rivals like Instagram when recruiting younger users.