As a huge fan of John Cage, I feel obligated to point out that this is not "scamming" - it is a true performance of a musical work[0]: https://en.wikipedia.org/wiki/4%E2%80%B233%E2%80%B3
John Lennon and Yoko Ono also did "Two Minutes of Silence"[1], which was later covered by Soundgarden as "One Minute of Silence" on the album Ultramega OK (they didn't like Yoko Ono's minute, so they only covered Lennon's[2].)
As Debussy famously remarked, "Music is the space between the notes."[3]
[0] Of course, that means they should probably be paying royalties to the Cage estate, but that's a separate matter....
[1] https://en.wikipedia.org/wiki/Unfinished_Music_No._2:_Life_w...