Originally Posted by
irishguy28
I'm delighted you used an Amex. I hope it was a Flying Blue Amex. Just think of the extra miles you will earn on that 90 cent spend!!!

Joke aside though, IIRC FB Amex Travel protection is only valid for tickets fully paid with the card. Imagine being refused assistance for a few EUR that you topped-up with a random Commoner Card!
At some point they will add in T&C that the mere fact of storing a Visa in the same wallet as your precious FB Amex is ground for contract termination.