Thank you for posting this. It was very informational and I appreciate having the copyright issue clarified. It always aggravated me when I see a design I like but they restrict it's use. It's nice to know what is and isn't true.
So if you buy a pattern you can make quilts from it and sell them even if they say you can't. Because their restrictions aren't legal. They can't restrict your use of the pattern. What you can't do is copy the pattern and sell it.
I was also impressed with how many times they used the Quilting Board as a source of info. that I wasn't expecting! LOL