Am I daft or does it only tell you it's for SF only when you click sign up? I mean, I figured it was SF only but it's kind of annoying that I can't really confi

Am I daft or does it only tell you it's for SF only when you click sign up? I mean, I figured it was SF only but it's kind of annoying that I can't really confirm that in any explicit way based on the landing page.