3D Secure Cards!
3D Secure is designed to make online shopping transactions safer by authenticating a cardholder's identity at the time of purchase, through the likes of Verified SecureCode by Visa and MasterCard.
Unfortunately, if you own one of these Cards, it won't work with the Bot. If you don't know if your card is secured or not, please contact your Bank and ask for the information.
You can use a prepaid card (not a prepaid gift card) instead of your credit card if it turns out that it has the 3D feature.