Giantess Fatale is still closed for registrations, as the website is receiving it's final touches in terms of minimal functionality.
There will be an "all site" account registration which will be free and allow access to all areas of the website with lots of free content. This will include the Forum, Blogs, Public Galleries and also the Store.
The premium content will be accessible for a minimal monthly subscription fee, but your account login will still remain the same. the system will know that you are a premium member.