Guest Wayne will just have to learn that the way folk works is that everyone whinges about the music receiving no mainstream attention and then whinges still louder when some attention comes along and robs them of their feeling of being special.
It's been like this for every one of the 35+ years I have been involved as a (bad) floor singer, (fair to middling) folk club organiser, writer and fan. I've been guilty of the same hypocritical thoughts at times and was delighted when Kate Rusby told me in an interview that she loved the fact that not everyone liked folk.
As it happens, I am very fond of the Unthanks' music, respect the views of those who are not and laugh at the idea that it is somehow wicked for them to have won big label backing after slogging it out at grassroots level.