The New York Times premium content is now free. The Times used to charge for access to what it determined to be free content. People searching for news would hit the password roadblock and leave, moving on to another source. With all the content and traffic that the Times has, they can most likely make more money by taking advantage of all that traffic and sell advertising instead. The Times seems to have a good system for targeting ads to users making it attractive to advertisers.
Times to Stop Charging for Parts of Its Web Site – New York Times