Permanent trial. It does not need to be more complex than that. Allow people interested in the game - interested in joining their friends or testing out the world - to create an account. To develop a character. To hunt. To interact. Half a month is not enough time to become attached. Ultima is a Social Game. At some point that person is going to want their own House or Castle. At some point that person is going to consider shelling out $12.99 a month for it. To decorate. To leave their mark.