Protection never switches off because of money. Everything already set up keeps working: schedules, app limits, places, “Arrival time”, “School”, the second adult and every connected device. The data stays. What is set up can be changed and removed; only the “School” timetable keeps working as it is, and changing it needs the subscription (removing it is always possible).
Only adding beyond the free version is held back: a third child, a second device of a child, another adult, a second place, a third schedule, a new app limit, a new “Arrival time”. Without the subscription the location history and the day's route don't open either (where the child is now is shown), nor the month report, calling the child (except during an SOS), “Sound around” (except during an SOS) or saving “School”.