The X Consortium (and its successor, the Open Group) offers an example: funded by companies that made proprietary software, they have strived for a decade to persuade programmers not to use copyleft.

• XConsortium（与他的继任者，OpenGroup）提供了一个例子：由开发专有软件的公司建立，他们努力了十年来说服程序员们不要使用著佐权。