Consume folk music?
I pay to listen to people at clubs (as opposed to going to sessions to participate)
I buy CDs from the artists or very occasionally from stalls at festivals
I get broadcast folk music from Verity Sharp or Fiona Talkington as an incidental aspect of their show, I don't normally listen to dedicated folk programming.

With regard to an "industry" just look at the sales stalls at any major festival. There are a couple of active record labels, a couple of major music retailers specialising in the field, any number of niche instrument makers and repariers and of course folk music is also an important element of the country's major independent CD distributor.