Portal:Oceans/Selected article/11
From YPPedia
On a Subscription Ocean you may play indefinitely, however, in order to use the for-pay features you must pay a fee to gain access to all those features for a month, quarter, or year. More info on Subscriptions.
On Doubloon Oceans you can play for free indefinitely, individual items and privileges are unlocked by paying with Doubloons, which can be purchased with real money. More info on Doubloons.