Hmmm, reads like a ploy to get you to use their freezer paper. I use Reynolds FP all the time and have used it for applique and for paper piecing (where you fold it back and stitch next to the fold, not through the paper) and I have never had an issue with it shrinking in any way. My pieces all still fit together no problem. I would think if there is an issue with shrinkage of the freezer paper there would be a problem with my units when I go to sew them together and I have not experienced that.