FWIW before I would cast doubt upon the “capacity” of listeners (at least from a general perspective:) ) I would suggest say around a zillion other reasons with the following seeming most apparent to me.

- the popularity of the genre or the sub-genre. The Americana styles we listen to will never show on a pop chart but that doesn’t mean there isn’t a large appreciative audience. It’s just not counted in the tens of millions.

- the potential the artist has for exposure including dollars behind them and/or their ability to self promote.

- the, dare I say, catchy variable. Beyond sheer talent is there something about the music that is engaging from a lyrical and melodic perspective.

- the alignment of the stars and planets

- etc.

Bud