Virgin Atlantic Amex sms service

I did a quick search of the forums, but could not find a thread, although I am sure I have read about it here previously.
Yesterday I recieved an sms from MBNA/Virgin to say that each and every Friday they will sms me my account balance.
The sms claims this is a free service and whilst it is of no great use to me, I wondered how common this is ? My parents both have the card and didnt get the same message.
Yesterday I recieved an sms from MBNA/Virgin to say that each and every Friday they will sms me my account balance.
The sms claims this is a free service and whilst it is of no great use to me, I wondered how common this is ? My parents both have the card and didnt get the same message.