When your trial has expired or you have downgraded your account from a paid plan you will be reverted to the free plan. Under the Free Plan you will still have access to limited content including some special programming.
If you would like to stop receiving release updates, promo offers etc. - just click the unsubscribe link at the bottom of any of the promo emails you receive and you will be removed from the marketing lists.
At this time customers are unable to delete their accounts. This feature is currently in development.