It's not the first time nVidia cards self-combust, so not quite, haha.
Also, your analogy is a bit off, but I can't think of a better one... This is like using your car on the street and then trying to go over the speed limit a bit, it breaks the engine block completely. You were just going on a different street instead of the usual one when it happened.
Amazon has nothing here to be blamed about, seriously. I'm not even trying to be an Amazon apologist. EVGA and nVidia should foot the bill for those cards. Period. Fortunately, most of those should be within warranty period still.
Regards.