This subject always pushes my buttons! Coming from the quilting tradition BEFORE "artistes" got hold of the medium, I am offended that they are in it for personal gain. I understand that this is their livilihood, and I agree that people have a right to protect their creativity. I also feel that to take an idea that was in the public domain and claim ownership by putting so many restrictions on it is an affront to the women who shared patterns and fabric and friendship out of necessity. To me it is insulting to their memory. Where does it stop? Is everyone going to have to stop clogging because Michael Flatley clogs in Lord of the Dance?
As I understand it, if a purchased pattern is an original idea and is copyrighted, it it intended for the use of the purchaser only, including as gifts, but not for resale. If your intended use is to make ten crib quilts from the same pattern and give them to ten pregnant women, that is perfectly acceptable. But you cannot make ten crib quilts and sell them at the local craft fair.
If you are making the quilt with the idea that it will be auctioned to support a recognized 501.3c charity, most designers seem to be okay with that, but it might be a good idea to check with them first. I am not sure about making ten crib quilts to donate to your church's bazaar for re-sale to benefit the church. Would be a good idea to check with the designer first.
Most designers also want the courtesy of credit on the label, particularly if the quilt will be entered in a show or competition.
Patterns in a magazine and on-line are pretty much the same. They are intended for the the use of the quilter, unless they are traditional designs in the public domain. In those cases, they cannot stop you from selling the quilts. The only thing they can stop you from doing is distributing their written directions. Which is why on-line forums get touchy about offers to mail patterns from magazines between members.
Even though the owners of the forums are not promoting the practice, by law, they need to discourage the practice and avoid the appearance of impropriety. They are caught between a rock and a hard place.
This is my own opinion, and probably falls into some gray area that I have never seen addressed. Very few of us create in a vacuum. We all take inspiration from somewhere. Sometimes from nature, sometimes from things in the public domain, sometimes from copyrighted material. And isn't that the point of art afterall. To inspire the viewer.
I think when you are inspired by something and use the idea as a stepping off point to create something new and different; at some point it ceases to belong to them. This happens all the time with inventions or manufactured goods. It is how advancements are made. The problem is, to my knowledge anyway, there is no hard and fast rule where that transition happens.
Hope this helps.