Yes, these signatures themselves are free; All you have to do is replace the number on the end of the link in the first post with your UserID, which can be found at the end of the link to your profile. This is what yours would look like:
To actually have the signature post itself to your posts, though, you will need to
buy a signature subscription. They start at $1.66 a month, and all proceeds go to keeping PiratesOnlineForums.com and its sister sites up and running. Without help from our subscribers Nick would have a hard time paying the bills for maintaining all 7 of these sites and their domains. Depending on which subscription you took to apply your signature, you would also receive one of
these awards.
You are also allowed to have a "fake signature", where you post the signature to the end of your posts yourself, but you have to maintain it and it still must follow our rules and policies.