In order to help fans kick-off their summer, the Pirates of the Caribbean Online team has partnered with Comcast to give 10,000 players each a free month of unlimited access to the game. To enter, all you need to do is visit this page on the official site and log in with your membership information. If you're not a member, you can register for free.
You have until June 30 to enter in the contest. A one-month unlimited subscription costs $4.95. You can read the official rules here.