Your plan includes a number of tracked members. Choose who they are; each one over the number is charged on the next bill.
After a change, that member's switch is locked for 24 hours; the switch shows when it opens again.
Tracking off hides their diet, workouts, measurements and progress here and locks them in their app. Nothing is deleted.
Over your plan's number: each extra tracked member is charged a month on your next bill, for the most tracked at one time since the last bill. Only the owner can go over.
Bills, classes and chat work for every member, tracked or not.
Still stuck? All help, or raise a ticket from the app (Support Tickets).