Good for them. Any body that can pull a little of the "music money" from the corporate interests, good enough...
Maybe it wasn't of any relevance, but post Nirvana Matchbox Twenty and Rob Thomas sure pulled in (and continue to) the millions.
But as others have said, it's really not important for the health of Rock and Roll. If you like to play "real instruments" that aren't acoustic and or country, then you'll be playing rock and roll.
I give away CDs all the time, yea people still have those too! I recently gave one of our new CDs to a 21 year old I met at the bar. He said it was his first time being able to sit at the bar! The next week he hunted me down to tell me he loved the CD and it was now his favorite, that he had found us on spotify and listened to it all the time.
Sure it was just one person, but there are plenty of young people who love our brand of Rock N Roll. Maybe our band isn't relevant, but we are original and we are Rock N Roll and we'll keep playing it till we're dead.