@angus.black and @WyzeJasonJ are correct! I’ve edited accordingly.
Welcome to the Wyze Community!
You don’t have to buy any new cameras! In your case you won’t have to pay for it because your an existing user. you just have to continue to use person detection until September. Then you will have to select $0 if you don’t want to pay.
New users would need to subscribe/pay for Cam Plus. Wyze recently said that they needed to start charging for person detection due to costs. More on that here: