As a part of an effort to bring Amazon’s Fire TV into as many living rooms as possible, the company is offering some of its customers a 30-day free trial of the Internet connected set-top box. Amazon is hand-picking participants by sending them an invite-only promotion email. If you’ve received the email, all you need to do is apply the offer and check out. Amazon will pick up the tab for now, you don’t even have to pay for shipping.