I'm not being snarky at all. Statements were made that did were inaccurate.
My card number was only used to make purchases at iTunes so I have to assume that the number was accessed thru my iTunes account where my card info is on file.
Once they have access to your account, they do not need the card number. It is linked to your account and they have the password which enables them to make purchases.
Accessing your iTunes account will not show your card number. When you log in, you can only see the last 4 so they could not gain access to the full CC number to do anything else.
However, that has been changed in the last week or two and you will need to supply the 3 security digits (I believe that's what it asks for) to do anything. And when you log in from a different computer, it will ask the same thing.
My advice to anyone using the iTunes Store is to not keep your card information on file with it
That has been my suggestion all along.
If you wish to make a purchase, enter your CC number, make the purchase then immediately remove it.