@Ryuusaki
What you are stating is most likely a result of spyware, malware, or keyloggers - and of no fault of Mojang or any of their affiliates. If what you're saying is truly an issue, then cases would be more prevalent and conspicuous. I've personally heard of no such hijacking of credit cards via Minecraft hitherto, and if such is veracious, then there would be a way higher rate of cases than a select few. Over 33-million people world-wide have registered on the site, and the game has been purchased, played, and enjoyed by over 6,500,000 people whom have not have their credit cards hacked. I don't know how many cases there are of this sort, and I myself have never seen any of the aforementioned cases - but I'm certain the percentage of incidents must be severely superseded by the percentage of people whom purchase the game without issue. I myself have been playing Minecraft for a couple of years now, I'm in the U.S., and I've had no problem with purchasing the game via credit card. So long as you buy from the official site, there shouldn't be any error.
I'm not trying to say that you're wrong - I'm just attempting to offer a different perspective since it's a great game that everyone should try; plus, the people over at Mojang are good, honest people. I'm sure hijacking your credit card information is the last thing they want - though in the end, it's up to you to believe what you wish.
