Been a Spam eater for a long time, so it was no problem to load up on a couple of cases "just in case" (cough). However, I've noticed, unlike before, that a slice shrinks to about half its size when fried. I can only come to the conclusion that they are doing like the rest and pumping more water into their product. I'm talking like a 40-50% shrink factor.
So . . . while the stuff might last forever, you might have only half as much as you think.