I got a box of some old upper deck baseball set last Christmas, and whatever the one-per-pack insert was, each looked like it was caught in the gears of the printing press. I sort of crease/indentation across the middle of each insert, and the insert was stuck to the card beneath it. Two ruined cards per pack. I also bought a wax box years ago where every base card was diamond-cut, but the inserts were fine. Seems like it was a fleer set but not sure.
I'm going to reevaluate how I collect after the new year. It's just getting way too expensive for the new stuff. Sometimes I just want to buy a pack, not a whole box or even blaster.