Subscription license is a paid and fully-functional license that expires at the end of the subscription term which is 1 or 3 years from the contract start date (depending on the subscription length).
The grace period of 1 month granted after the expiration of license for purpose of renewal. During this period, the program functionality is not limited by any means. After this period, processing of all user accounts in all organizations will be stopped; scheduled jobs will be terminated with failure. In both cases, a notification message will be shown to notify you that your license is either about to be expired or has expired.
The restore abilities will continue to function regardless of whether your license has expired or not.
Additional process of no more than 10 user accounts or 10% of the license count (whichever is greater) granted if your subscription license has exceeded its limit by up to 10 user accounts or up to 10% of the license count.
If exceeded by more than 10 user accounts or more than 10% of the license count (whichever is greater), you can process these 10 (or 10%) extra user accounts according to the FIFO queue logic (that is, "first in - first out"); no more additional accounts are allowed.
The grace period in this case is not limited and lasts during the whole term of the subscription.