I had mine compromised after using it at an American-based e-book publisher (one of the indie publishers). Someone hacked into the database of the subcontractor who was handling their sales or CC information or something. The publisher got rid of that company, got a new one, and contacted people who were affected, but I never got the e-mail. I only learned after my credit card was blocked. Luckily I didn't have to pay for the charges, but it was still a huge pain. I avoided that e-publisher after that, except for a couple of purchases through PayPal or through a third party such as FictionWise.