Not Ranked
The only thing it helps is when someone steals your credit card number from a impression or from the statement in the mail. They don't have the security number. Now as far as the mail, they have your complete billing information, so they can likely get what they want anyway. I personally believe it is more to make the user feel more secure. Kinda like a government program.
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Why do they call it "Common Sense" when it is so rare?
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