what's the level of safety in using carded e-gift cards? if i complete the process and eventually end up with the e-gift card, can it be safely used from my real account or someone else's? or will Amazon, etc. flag it instantly and be like, this gift card was obtained through "fraudulent" means and we have some questions? some claim they're "untraceable", but it seems that the numbers would be tied to the original cc used to purchase? educate me on safety