I've got the same problem and was discussing with an admin about that..
I actually have the money (more than needed to buy the hacks) on my paypal account. I don't have a credit card verified with my account. But I can't buy it with my PayPal funds. This system is (sorry) just bullshit. Who would use that? You're just loosing customers.. But hey, since it got detected again I'm actually relieved that I didn't buy it.