"grace" mode => modo de funcionalidade limitada

"Grace" and "Lockdown" Status
If your subscription is not active (canceled or declined), your account will automatically expire when it reaches the expiration date (which is usually the next day after the date when your next payment was supposed to be made). On that date the account will be placed into "Grace" mode for 15 days.

An account in "Grace" mode has limited functionality, and the members could complete the outstanding payments, setup a new subscription and reactivate their account without any penalties.

Note: If an account in Grace mode is reactivated, the next payment date will come 30 days after the expiration date, but not 30 days after the payment has been made!!! In other words - the members are still paying for the time spent in Grace mode when they reactivate.
http://support.empowernetwork.com/index.php?/Knowledgebase/A...


Customers can cancel at any time and are given a grace period of 14 days.
Once they have cancelled, they can no longer use the app. However, they can log-on during the grace period to reactivate. They can also use this period to download their data.
http://www.answers.onstartups.com/questions/50168/grace-peri...

Core grace mechanisms
A graced object is an object that has expired, but is still kept in cache
Grace mode is when Varnish uses a graced object
https://www.varnish-software.com/static/book/Saving_a_reques...

Grace and saint mode
If the backend takes a long time to generate an object there is a risk of a thread pile up. In order to prevent this you can enable grace. This allows varnish to serve an expired version of the object while a fresh object is being generated by the backend.
https://www.varnish-cache.org/docs/3.0/reference/vcl.html