These remind me of the postcard photos of dead children that used to be a staple for the traveling photographer, back in the frontier and early settlement days. Sometimes the body had been stored for a time specifically to be able to get a picture, and it showed in the pale, extra smooth, unmoving features with large sunked (closed) eyes.

The difference is, I can understand the parents of 100 years ago wanting some small tangible souvenir. The people who pay for these I can't understand at all.