Background: The Smashing Pumpkins (or Smashing Pumpkins) are an American alternative rock band from Chicago, Illinois. Formed in 1988 by frontman Billy Corgan (lead vocals, guitar) and James Iha (guitar), the band included D'arcy Wretzky (bass guitar) and Jimmy Chamberlin (drums) in its original incarnation. It has undergone many line-up changes over the course of its existence, with the current lineup being Corgan, Chamberlin, Iha and guitarist Jeff Schroeder. Disavowing the punk rock roots of many of their alt-rock contemporaries, they have a diverse, densely layered, and guitar-heavy sound, containing elements of gothic rock, heavy metal, dream pop, psychedelic rock,progressive rock, shoegazing, and electronica in later recordings.
Context: With the breakthrough of alternative rock into the American mainstream due to the popularity of grunge bands such as Nirvana and Pearl Jam, the Smashing Pumpkins were poised for major commercial success. At this time, the Smashing Pumpkins were routinely lumped in with the grunge movement, with Corgan protesting, "We've graduated now from 'the next Jane's Addiction' to 'the next Nirvana', now we're 'the next Pearl Jam'."  Amid this environment of intense internal pressure for the band to break through to widespread popularity, the band relocated to Marietta, Georgia in late 1992 to begin work on their second album, with Butch Vig returning as producer. The decision to record so far away from their hometown was motivated partly by the band's desire to avoid friends and distractions during the recording, but largely as a desperate attempt to cut Chamberlin off from his known drug connections. The recording environment for Siamese Dream was quickly marred by discord within the band. As was the case with Gish, Corgan and Vig decided that Corgan should play nearly all of the guitar and bass parts on the album, contributing to an air of resentment. The contemporary music press began to portray Corgan as a tyrant. Corgan's depression, meanwhile, had deepened to the point where he contemplated suicide, and he compensated by practically living in the studio. Meanwhile, Chamberlin quickly managed to find new connections and was often absent without any contact for days at a time. In all, it took over four months to complete the record, with the budget exceeding $250,000.  Despite all the problems in its recording, Siamese Dream debuted at number ten on the Billboard 200 chart, and sold over four million copies in the U.S. alone. Alongside the band's mounting mainstream recognition, the band's reputation as careerists among their former peers in the independent music community was worsened. Indie rock band Pavement's 1994 song "Range Life" directly mocks the band in its lyrics, although Stephen Malkmus, lead singer of Pavement, has stated, "I never dissed their music. I just dissed their status." Former Husker Du frontman Bob Mould called them "the grunge Monkees", and fellow Chicago musician/producer Steve Albini wrote a scathing letter in response to an article praising the band, derisively comparing them to REO Speedwagon ("by, of and for the mainstream") and concluding their ultimate insignificance. The opening track and lead single of Siamese Dream, "Cherub Rock", directly addresses Corgan's feud with the "indie-world".  In 1994 Virgin released the B-sides/rarities compilation Pisces Iscariot which charted higher than Siamese Dream by reaching number four on the Billboard 200. Also released was a VHS cassette titled Vieuphoria featuring a mix of live performances and behind-the-scenes footage. Following relentless touring to support the recordings, including headline slots on the 1994 Lollapalooza tour and at Reading Festival in 1995, the band took time off to write the follow-up album.
Question: How were they discovered?

Answer:
due to the popularity of grunge bands such as Nirvana and Pearl Jam, the Smashing Pumpkins were poised for major commercial success.