Their swag booth at the concert.
That is where they have a chance to make some money.
I didn't say, "oh I am a magic wizard with a way for musicians to make money online," instead I expressed the opinion that they are foolish to restrict the promotional value of online interest in them by using proprietary platforms unless those platforms are actually making them money. If it isn't paying, then they should be giving digital media away, to promote their concerts.
Musicians who make a lot of money, make it at their concert. Except for KISS, who make it through merchandising. Why does Madonna still tour, and still do all that sexy dancing night after night? Why does she work so hard? Why doesn't she just make more albums? Because she gets pennies from an album sale, but people pay $500+ for a ticket to see her, and she gets most of that money.
A musician who cares about selling records, that's what I call a really nice and selfless person who lives to enrich their record label.