You can be a premium user through an auto-renewing subscription:

12-Month Plan, first 3 days free and then $59.99/year

1-Month Plan, first 3 days free and then $9.99/Month

1-Week Plan, $3.99/Week

- Payment will be charged to iTunes Account at confirmation of purchase

- Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period

- Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal

– Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase

- You may cancel a subscription during its free trial period via the subscription setting through your iTunes account. This must be done 24 hours before the end of the subscription period to avoid being charged. Please visit http://support.apple.com/kb/ht4098 for more information

- You may turn off the auto-renewal of your subscription via your iTunes Account Settings. However, you are not able to cancel the current subscription during its active period

- Any unused portion of a free-trial period, will be forfeited when the user purchases a subscription