We had a very long discussion about this at the retreat I just went to. Most of the quilters had never heard about this. Frankly, I think it is ridiculous to buy a pattern and have so many stipulations as to how you can use it. Why do they make a pattern for sale if they want to dictate the way you can use it. I agree that you shouldn't copy it and give it away to numerous people, but other than that I think I will be boycotting any pattern maker who thinks they can tell me how to use the pattern and tells me that I can't even show that quilt at a quilt show without their permission.