you dont even need to register, just go here and enter email and tick the box, jobs a good 1!!
You were already signed in, which is why you saw the page with just email and the checkbox.. anyone not registered wont see that page.
Oh.. and I'd recommend NOT ticking the box, as it is not required and it is an opt-in for email communications..
I agree that the Axel Springer AG or its subsidiaries in the future to inform me by phone / email / SMS on interesting media products. Optional information. I may object to the use of my data for advertising purposes at any time over a computer screen online services GmbH, Axel-Springer-Platz 1, 20350 Hamburg or via e-mail to firstname.lastname@example.org.