Hmm... I've noticed something. When you follow that link and enter a domain name which is available you can register it for free, but if you enter, for example, mysite.com which is already registered and mysite.net is available, they will offer you to register mysite.net for $35 per year. If you really want to register mysite.net then go back, enter it and re-submit the form.
Doesn't make any sense, but that's how they roll
