The phrase 'The band's 1993 debut album' is also confusing to the careful reader, because a band could not have had a 1993 debut album, and also, for example, a 1994 debut album.
Some observers might guess that Nickelback is playing for free because of its charitable relationship with The United Way (the band will donate a quarter for every person who pledges to become a volunteer reader, tutor or mentor).