The site certainly could have been executed better. I'm also baffled that companies still ask for so much personal information just in order to send you an email every few weeks. However, this did reveal one very nice user interface feature that I would love to see become the default for such forms.
The dropdown for your birth year is broken down visually into decades. This makes finding the 70s so much easier at a glance than scrolling meticulously through an expansive list. A very nice little user experience amidst a site mired in flawed logic.