There are certain songs that simply don't fit the radio medium very well. They may be too long, too artsy, too controversial, too dark, too political, or simply, regardless of quality or merit, are just too risky to fit on a playlist when the Billboard top 40 is so much easier. As a consequence, some acts get exposure that others cannot. For music, Radio Friendliness is the opposite of True Art Is Incomprehensible. Of course, no matter how much Fan Dumb a niche-artist's audience possesses, sometimes, their music is just too boring or too bad to be played on the radio.