You can set up a Billing Plan to unlock multiple Premium Chatrooms. That means that a member who purchases access to Chatroom A will get access to Chatroom B and vice versa.
This can be easily done by assigning the Billing Plan to all Premium Chatrooms you wish to unlock. Navigate to Dashboard → Chatrooms → #Chatroom Name → Billing for each chatroom and switch on the Assign toggle.
First Premium Chatroom:
Second Premium Chatroom:
With the above set-up a member who purchases the "Monthly Billing Plan" unlocks the #Premium Signals and #Macro Analysis chatrooms.