This is the most interesting quote. How do these devices help in the case of identity theft?! How can charging a card help either the bank or the account owner

This is the most interesting quote. How do these devices help in the case of identity theft?! How can charging a card help either the bank or the account owner in the case of police apprehending a carder? The only possiblity that comes to mind is that the police empty the cardholder's account and then later return that money minus the device manufacturer's 7.7% cut?!