Question: Move Your Domain Day is a domain name transferring initiative, initially in response to GoDaddy's support of the United States Stop Online Piracy Act (SOPA), first held on 29 December 2011, originating from a post on which American social news aggregation, web content rating, and discussion website?

<P0-S0> A social news website is an Internet website that features user-posted stories. <P0-S1>  Such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. <P0-S2>  Users typically comment online on the news posts and these comments may also be ranked in popularity. <P0-S3>  Since their emergence with the birth of Web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. <P0-S4>  All such websites allow the users to submit content and each site differs in how the content is moderated. <P0-S5>  On the Slashdot and Fark websites, administrators decide which articles are selected for the front page. <P0-S6>  On Reddit and Digg, the articles that get the most votes from the community of users will make it to the front page. <P0-S7>  Many social news websites also feature an online comment system, where users discuss the issues raised in an article. <P0-S8>  Some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. <P0-S9>  Some social news websites also have a social networking function, in that users can set up a user profile and follow other users' online activity on the website. <SEP> <P1-S0> On January 18, 2012, a series of coordinated protests occurred against two proposed laws in the United States Congress—the Stop Online Piracy Act (SOPA) and the PROTECT IP Act (PIPA). <P1-S1>  These followed smaller protests in late 2011. <P1-S2>  Protests were based on concerns that the bills, intended to provide more robust responses to copyright infringement (colloquially known as piracy) arising outside the United States, contained measures that could possibly infringe online freedom of speech, websites, and Internet communities. <P1-S3>  Protesters also argued that there were insufficient safeguards in place to protect sites based upon user-generated content. <SEP> <P2-S0>  Reddit's registered community members can submit content such as text posts or direct links. <P2-S1>  Registered users can then vote submissions up or down that determines their position on the page. <P2-S2>  Submissions with the most up-votes appear on the front page or the top of a category. <P2-S3>  Content entries are organized by areas of interest called "subreddits". <P2-S4>  Subreddit topics include news, science, gaming, movies, music, books, fitness, food, image-sharing, and many others. <P2-S5> Reddit ( ) is an American social news aggregation, web content rating, and discussion website. <P2-S6>  The site prohibits harassment, and moderation requires substantial resources. <SEP> <P3-S0>  The Electronic Frontier Foundation, Reddit, and domain registrars Name.com and Hover have also participated. <P3-S1> Move Your Domain Day is a domain name transferring initiative, initially in response to GoDaddy's support of the United States Stop Online Piracy Act (SOPA). <P3-S2>  It was first held on 29 December 2011, originating from a post on Reddit and spearheaded by domain registrar Namecheap. <P3-S3>  In 2012, Namecheap began an initiative to make Move Your Domain Day an annual event. <P3-S4>  The second event was held on 22 January 2013. <P3-S5>  The third time was held on 5 February 2014. <P3-S6>  The fourth was held on 27 January 2015. <P3-S7>  Namecheap has defined the initiative as "an annual protest and a commemoration of sorts that will continue to shine a light on the issue of a free and open internet."