I sorta blame big media companies for this. They have been trying to kill used movie/game sales for decades, moving to these (should be illegal) licensing models, etc. In doing that, they have failed to allow an infrastructure to form that would keep used or third-party purchases "legit" so you end up with sites that have no choice but to live in the grey area, even cdkeys.com that (allegedly) sources their keys 100% first-party legitimately.

Ultimately, credit card fraud will always be a risk. Someone installed a barcode copier on a local gas station machine a while back, and they bought 5 PS4s on it before the Bank got wise. It's a little easier in other countries because there's no physical shipping to deal with, but it's not really creating the market. As a defrauded individual, you just can't chargeback a playstation that was sold anonymously on ebay and already shipped.