At the end of the free 30-day trial, your workspace will automatically move to the Free Forever plan. For example, team members will only be able to give 5 kudos per week.
In order to continue using Matter without restrictions, a workspace Owner/Admin will need to add a payment method.
How to Add a Payment Method
Open the Web App.
Go to Channel Settings > Billing tab.
Select the monthly or annual plan.
Enter in card information and hit Submit Payment.