Great minds think alike. I also wondered that and talked to a few of those vendors and said they should donate them to a local quilt guild for Linus quilts, dog beds, etc. As we were walking past one of the booths, Martelli's, the trash was being collected and you would not believe all of the scraps. Just think of all of the scraps created by GO!, Accu-quilt cutters, etc. What a waste to go in the trash. If they donated them to organizations, think of the publicity they would have.
Then when we got to the Linus booth I mentioned they should talk to the long arm vendors and ask for the squares and demo pieces.