The "free" part of the query likely refers to a specific Canada Post program rather than Pirate Ship. Canada Post offers every October for small businesses.
: For thefts from your property, contact your local police non-emergency line (e.g., Edmonton Police Service at 780-423-4567). Notify the Sender pirate ship canada post free
This rate is often than walking into a Canada Post retail location. For a 1kg package to California: The "free" part of the query likely refers