I don't know about all the time, but when I flew from Delhi to Bangkok on Thai Airways, Scandanavian Airlines checked us in, and the boarding passes were handed out with Bangkok stamped under destination and the seat numbers where stickers which had been peeled off a master sheet
That was rude of me, sorry. Maybe Spirit still does that, they seem so antiquated. And I think at WN you just mow everyone down for the best seats. I remember New York Air had little red apples for their seat assignments.
Sorry I couldnt help you out LAX. And I take back what I said about you answering your own questions.
The last US domestic airline that I remember using stickers was the US Airways Shuttle. But they went to computerized boarding passes two or three years ago. I still have a few of their boarding passes with stickers on them.