CouchSurfing is a hospitality exchange service by which users can request free short-term homestays or interact with other people who are interested in travel. It is accessible via a website and mobile app. It uses a subscription business model, and while hosts are not allowed to charge for lodging, members in some countries must pay a fee to access the platform. Couchsurfing was conceived by computer programmer and New Hampshire native Casey Fenton in 1999, when he was 21 years old. The idea arose after Fenton found a cheap flight from Boston to Iceland but did not have lodging. Fenton hacked into a database of the University of Iceland and randomly e-mailed 1,500 students asking for a homestay. He received between 50 and 100 offers and chose to stay at the home of an Icelandic rhythm and blues singer. On the return flight to Boston, he came up with the idea to create the website. He registered the couchsurfing.com domain name on 12 June 1999. Fenton was also inspired by a trip he took 2 years earlier to Egypt, where he was shown around by a local. Couchsurfing International Inc. was formed on 2 April 2003 as a New Hampshire nonprofit corporation, with plans to apply for 501(c)(3) tax exemption. The website was launched on 12 June 2004 with the cooperation of Dan Hoffer, Sebastien Le Tuan, and Leonardo Silveira. From 2006 until the company raised financing in 2011, development of the website occurred mostly at events called "Couchsurfing Collectives", in which members met to voluntarily improve the website. Collectives took place in Montreal, Vienna, New Zealand, Rotterdam, Costa Rica, Samara, Alaska, Istanbul, and Thailand. However, the collectively-coded website was full of software bugs and crashes were common. Many members believed that the website needed to be redesigned from scratch. The collectives were also hindered by volunteers who just came to party and by tax laws in each jurisdiction. In June 2006, problems with the website database resulted in much of it being irrevocably lost.