Скорее, то, что за чтение expertsexchange надо платить, а за серверфолт и его братьев - нет.
All materials displayed or performed on the Network, including, but not limited to text, graphics, logos, tools, photographs, images, illustrations, software or source code, audio and video, and animations (collectively, “Content”) (other than Content posted by Subscriber (“Subscriber Content”)) are the property of Stack Exchange and/or third parties and are protected by United States and international copyright laws.
Так что не то, что я привык называть свободным в смысле Столлмана, но хоть доступ дают.
no subject
Date: 2012-04-24 16:05 (UTC)All materials displayed or performed on the Network, including, but not limited to text, graphics, logos, tools, photographs, images, illustrations, software or source code, audio and video, and animations (collectively, “Content”) (other than Content posted by Subscriber (“Subscriber Content”)) are the property of Stack Exchange and/or third parties and are protected by United States and international copyright laws.
Так что не то, что я привык называть свободным в смысле Столлмана, но хоть доступ дают.