kind of got me to wondering as well because it seems at some level you almost have to do a distro through the majors to make headway, I wouldn't call that a "mindie deal" really since it is created outside of the majors and could be a single shot contract with no obligation past that point.
This happens in the beer world all the time due to distribution laws especially when it comes to interstate distribution. It is a pretty crappy racket in both cases but until someone figures out how to ditch it then it may be a necessary evil for a while yet.
my thought on it though is that if a person could create enough noise organically they couldn't help but get spins on some level, but that would only work for independently owned radio or college radio, everything else is owned by Clear Channel and iheartmedia who won't play anything that isn't through soundscan or payola