^ This, 100%.
I simply do not buy the line that a postal employee took the time to open a box without damage, replace the contents (which they likely had little-to-no concept of the value without doing an extra step of researching the product), and replacing it with an exact amount of paper. Not to mention that they would then need to still take one more step in trying to sell the fairly rare chips to get any semblance of value for the effort.
Unless they were trying out for the next Oceans 11 movie, nobody is going to take that many steps when packages get lost (either legitimately or through theft) on a regular basis.