Any users or resources over the limits for an expired subscription will be blocked. A user can be assigned seats to multiple solutions, so the same user can be blocked in one solution but unblocked in another. This is because solutions have independent subscriptions.
Users are blocked using "Last In, First Out" (LIFO) logic. For example, the oldest user(s), according to the date they joined the organization, will keep their licenses active.
Blocking users takes place the moment the subscription ends.
Blocked users can log into the API Hub with limited privileges within each feature.
Any roles or permissions assigned in API Hub features are retained when a user is blocked. Roles and permissions are automatically restored if a user is unblocked based on a new or upgraded subscription.
The blocked state is recalculated if an administrator manually revokes the subscriptions to free up seats.
Important
To avoid payment processing issues and potential blocked users. It is recommended that you keep your credit card information up to date and periodically monitor your subscription renewal.
You can grant a user access to a specific plan or subscription. If a subscription shows a locked 
icon next to the user name, it indicates insufficient seats are available. To unlock the subscription, perform the following steps:
Click the ellipsis button next to the member you want to unlock the subscription.
Select the Unlock Subscription option to unlock a locked subscription. If there are available seats, the subscription will be automatically assigned.
Note
Auto unlock is only possible if you have extra seats in your subscription when you click the Unlock Subscription option.
The Not Enough Seats dialog box appears if no seats are available to assign to the selected user. You are prompted to upgrade your plan to add additional seats.
Click Upgrade Plan to add more seats or upgrade your existing subscription.