That same year Pearl Jam canceled its summer tour in protest of ticket vendor Ticketmaster's unfair business practices. Pearl Jam then began a boycott of the company; however, Pearl Jam's initiative to play only at non-Ticketmaster venues effectively, with a few exceptions, prevented the band from playing shows in the United States for the next three years. In 1996, Alice in Chains gave their final performances with their ailing and estranged lead singer, Layne Staley, who subsequently died from an overdose of cocaine and heroin in 2002. In 1996, Soundgarden and Screaming Trees released their final studio albums of the 1990s, "Down on the Upside" and "Dust", respectively. Strong states that Roy Shuker and Stout have written that the "... end of grunge" can be seen as being "... as late as the breakup of Soundgarden in 1997".