Leessang's Gil revealed that all the profits from Leessang & YB's collaborative track "Mad Man" will be donated.

At a press conference for the concert, Gil revealed, "There's a reason why we started to work on 'Shut Up Concert'. When we started selling tickets for the concert, we received a lot of love. Our concert was sold out in an unbelievably quick time frame and we made this concert to make music with the feelings we felt back in the day. We're going to donate all the profits from this song to the underground artists out there, so they can continue to what they love and make music."

He continued, "We should be at ease after deciding to donate the profits, but we're actually nervous. I hope everyone gives their support and love to "Mad Man" so we can donate for a good cause."

Gary added, "I want to also have this 'Shut Up Concert' next year with YB as well. Even if it's not a collaboration between YB and Leessang, this concert will continue."