Pretty sure it is because you have a cookie set that tells them you do have an acccount, so they prompt you for login. If you click the link in a private windo

Pretty sure it is because you have a cookie set that tells them you do have an acccount, so they prompt you for login. If you click the link in a private window, I almost guarantee it wont prompt for login. Quite annoying and it can add significant load time to pages even if you are signed in.