The topmost performers in the indie market may achieve some success on their own, as individuals, but in aggregate the total indie market is a disaster.
The reason for low sales outside major labels, is the fact that there are no outlets for unsigned musicians that are worthwhile, and major labels regulate what you hear, and who is heavily promoted. And therefore, the competiton is not level. Unsigned musicians cannot afford expensive studio time to record, have little avenues to promote and sell, and therefore just cant compete. The indie market is a "disaster" as you put it, because major labels, the RIAA and FCC keep it that way on purpose. Who wants an area of business to succeed and compete, if they cannot get a piece of that revenue? No one.
Now how about Digg has done for news, and YouTube has done for music? Leveled the playing field, and taken some of the wind out of the sails of major media. And put more power in the hands of the consumer, and allow then to choose whats best in music. Not tell them what you want them to listen to.
Saying there's no "dark" market is like saying there are no desktop OSes bare Windows.
But, there is one or two, you know; and it bites.