The entertainment industry has changed so much in the past 40 years. Driveins were dying out by the 70's with the onslot of cable TV, since the movie theaters have been drying up, there used to be dozens of clubs in local areas for local bands to play, now they are few and far between, DJ's didnt help the scene for bands, neither did the DWI laws. Arcaids were big bucks for the owners in the 80's home video stuff killed that which is a good thing with the addiction due to the nature of the games. Some people used to drop some serious change trying to beat those games. now computers are the greatest home entertainment... who the fuck rides bicycles anymore ? You couldnt get me off mine when I was a kid, even a teen, it was the second best thing to my guitar.
CD's can eat up money quick, especially new releases. Buying new music I believe has always primarily been to a more youthful market, as one gets older more important fiscal responsibilities take priority. Most youth gets their money from Mom and Pop because I rarely see them working, we at least used to mow lawns or deliver papers, wait tables, wash dishes, ect. Chances of talking Dad out of money to buy "that horrible rock music" was slim. So today I imagine kids have a limited expence account and they will go for the games and grab what comes free easily. I can see professionals opposing it, only for very few is it a great success. Most just get by and tour like hell hoping they sell tickets and merchandise, not alot has really changed there, the 80s was probably the pinacle of excess stardom for so many bands, at least enough money to allow them to party all the time and get strung out on some stupid drug. Now today most are painting houses or in some form of construction. The life of a bard has never met much success againt the percentage.
So I would say chances are that if most didnt steal the music they would never have it anyhow. Or do like we did where one guy would buy such and such a tape and the rest of us would copy our own from that. Music "sharing" is nothing new. Even back in the days of albums one guy would buy ___ another guy ____ and then we would rotate them around.