Thanks for posting this! I had a cart in Wizard Labs. It's always a terror to read things like this. Same thing happened on MyFreedomSmokes a few weeks ago. I received an email from MyFreedomSmokes notifying me that my card information was compromised.
Just for safety purposes I contacted them and had them delete all my account information and notified my bank. I made multiple purchases during the month from different vendors with my card so I was worried. Most banks, if you notify them of the possible breach in security will set an active alert / notes on your account just in case you have to file a claim for a fraudulent charge(s). Paypal and these new "Burner Cards" are definitely safer alternatives.