> So none of [the royalty system] makes sense... if a song is played on the radio, 100% of the royalties go to the songwriter. But if the same song is played on a streaming service, only about 20% of the royalties go to the songwriter. Where does that come from?"
Radio uses public airwaves, and is largely an exception to how the music business works. Not even recording artists get revenue from radio plays, only the songwriters (aka copyright holders).