These calls are being generated by relatively few robocallers who are collecting money and have service provided by phone companies which track and meter every

These calls are being generated by relatively few robocallers who are collecting money and have service provided by phone companies which track and meter every minute. This is a significantly different environment from online email spammers who can hide behind bot nets, open relays, and don't take payments directly. Instead, robocallers appear to operate in a near perfect knowledge environment for prosecutors (with the will to act).