If people would rather pay for GNU plus service than get GNU free without service, a company to provide just service to people who have obtained GNU free ought to be profitable.

• 如果有人宁愿花钱买有售后服务的GNU而非免费得到没有服务的GNU，一家专门为那些免费拿到GNU的人提供服务的公司应该会很赚钱。