What can I say, it's a good point. 500px does this nicely by giving you an anon user account on your first visit, and you can use the site in full that way. If

What can I say, it's a good point. 500px does this nicely by giving you an anon user account on your first visit, and you can use the site in full that way. If you prefer to "sign up" and keep your stuff, it can be done.