I wanted to make a purchase on my PS4 and tried to enter my curve card as the credit card. After a bit of thinking it told me the card number was incorrect. I checked it several times, and even tried entering via a web browser on my PC but Playstation were having none of it!
So I used a different credit card which went through fine.
However I did note when looking at the new card’s pending transactions online, a pending charge of £0,00. I wonder if that’s what upset curve, a pre-auth request for zero. Other websites do a test of £0.10 or £1.00 and I’ve never had problems with curve on one of these.