For some the GPL is a religion for others it is a business model. I have long been concerned that open source creates non-competive monopolies. In the 1990’s there were many webservers but in after a couple of years only Apache and Microsoft IIS remained. When I posed this to O’ Reilly (of the books) at the time he said that open source allowed developers to compete higher up the value chain. This has reached its natural conclusion with Automattic the firm behind WordPress eating the market for services. This is described in a good comment by Alec Kinnear on this post.