Complex sentence: Commercially, it is possible that the album's in-crowd appeal is because no popular single derived from it; the sole attempted single was "That Joke isn't Funny Anymore", which only went as high as 49 in the UK charts.
Split into simpler sentences: Commercially, it is possible that the album's in-crowd appeal is because no popular single derived from it. The sole attempted single was "That Joke isn't Funny Anymore", which only went as high as 49 in the UK charts.