indicated that Flickr's action was a sensible, if unattractive, precaution against prosecution, although later coverage implied that Flickr's action may have been unnecessarily strict. On June 20, 2007, Flickr reacted by granting German users access to "moderate" (but not "restricted") images, and hinted at a future solution for Germany, involving advanced age-verification procedures. Since June 1, 2009, Flickr has been blocked in China in advance of the 20th anniversary of the Tiananmen Square protests of 1989. Copyright enforcement Michael Arrington of TechCrunch and the Electronic Frontier Foundation have criticised Flickr for its heavy-handed implementation of the Digital Millennium Copyright Act (DMCA) and Online Copyright Infringement Liability Limitation Act (OCILLA). Under OCILLA, a service provider such as Flickr is obliged to delete or disable access to content as soon as they receive an official notice of infringement, to maintain protection from liability. After having one of his own pictures taken down following an incorrect DMCA claim, British comedian Dave Gorman researched the issue and concluded that if the Flickr user was not based in the United States or they were, but the person filing the notice of infringement was not, Flickr deleted the disputed content immediately. Even if the user could successfully demonstrate that the content did not infringe upon any copyright, Flickr did not, according to Gorman, replace the deleted content. He argued that this was contrary to its obligations in responding to a counter-notice. Shortly afterward, Flickr changed its policy. In 2019, Flickr added new theft detection tool options to certain users. Some subscribers will be provided "copy-protection tools that can detect if their images have been used without permission," the BBC reported in 2019, noting "Flickr Pro subscribers will be able to monitor up to 1,000 images and send automated copyright claims to people or companies that use their photos." Sale of Creative Commons-licensed photos In November 2014, Flickr announced that it would sell wall-sized prints of photos from the service that are licensed under Creative Commons licenses allowing commercial use. Although its use of the photos in this manner is legal and allowed under the licenses, Flickr was criticized by users for what they perceived to be unfair exploitation of artists' works, as all the profits from these offerings go to Yahoo! and are not shared with their respective photographers, and users were not given a means of opting-out from the program without placing their photos under