 For example, buying a specific in-game item may cost 5 doubloons and 5,000 PoE on a doubloon ocean, but only 5,000 PoE on a subscription ocean.The first subscription ocean opened on December 8, 2003, the official launch date of the game.Subscriber oceans are named after different shades of blue - the ocean that follows the subscription method of payment is known as "Cerulean".