Ned: Ya never know - we just may be related somehow. I too won't ever allow their license plate advertising. They claim they don't understand why - everyone loves their frame. I'm so happy for everyone else.
It doesn't make sense to put the PayPal logo on the key - as you said security. They even tout it as something you can put on your keychain. Well what happens when your keys are lost - and someway the person who ends up with them knows you. I know it's a long stretch to say they can get into you PayPal account - but why tempt fate.