Couple of reasons -
If the inquiries are legit sunscribers - they want to verify that you have no balance on your smartcard regarding PPV's, etc.
If the inquiries are hackers - they want to see if it is worth the bother to try to hack your card/receiver.
If the inquiries are legit sunscribers - they want to verify that you have no balance on your smartcard regarding PPV's, etc.
If the inquiries are hackers - they want to see if it is worth the bother to try to hack your card/receiver.