The series had a runaway success during the first few seasons, but after the series' fourth season, the popularity and ratings for Fear Factor began to decline. By 2006, when Fear Factor was in its sixth season, the ratings for the series were in steep decline as a result of content concerns and a growing loss of viewer interest, coupled with the series facing tough competition with other TV shows in the same time slot. As a result, the series was only averaging a 2. 6 in the ratings. Later that year, Fear Factor faced tough competition with the TV ratings champion, Fox's talent series American Idol on Tuesday nights, and the ratings declined further, and continued to trend further downward during this period. Despite much publicity concerning an improved format and better stunts for Season Six, the series' ratings continued to drop and consequently, NBC put the struggling program on hiatus for the remainder of the season to make room for the sitcom Joey, which was removed from the NBC lineup a few weeks later. After a continuous and steep drop in the series' ratings, it was officially cancelled by NBC in May 2006 after six seasons and the network began airing the remainder of the season on June 13, 2006, with the remaining episodes to be aired throughout the summer, with its last episode airing on September 12, 2006. In 2004, Fear Factor became the first network reality show to be syndicated. Over its six seasons, Fear Factor earned NBC a reported $600 million in advertising revenue. Currently only the first season has been released on DVD, but in early 2009, plans were made to release a box set containing the entire series on DVD. The project was put on hold for an unknown reason in March 2010. On June 5, 2010, it was announced that the project was cancelled because of the low sales of the first season DVD.