Easy: we can sell your email address and other data we collect.
An accout will do nothing at first. It may be of some use later, if we activate comments on the articles: your username will be added automagically in the comment form alongside your email address (which, obviously, will never be disclosed and only use for gravatar (if we activate that) and internal mailing).
That said, if you create an account and are willing to contribute with contents, you may send us your username and motivation to firstname.lastname@example.org. We will then activate your administrator level, and you'll be able to publish content.
Please read our User Content and Conduct Policy