I tried, but they have a form that claimed it works but does not actually work for my American Express card. I cleared it all and typed it in looking at my card and it claimed my CVV was invalid.
It worked with another card.
I'm home and ill today so I can't do any actual work which is why I had time for this charade. Any other day I would have simply hit the back button and ignored them.
Talk _is_ cheap. A broken billing form? Now that is costly.