Go see those bands live and buy something from their merch table, they'll make a lot more money than if you just buy albums.
I would expect an artist to get a far larger cut off Bandcamp than merch or tickets.
Artists get like 85% of a zero cost digital sale.
I can't imagine a ticket being close to that after ticketmaster takes a cut, the venue takes a cut, and the band pays all the expenses of touring.
I got the impression the stuff the GP was buying was not a bunch of independent small artists that only have a Bandcamp page and no label. Ticket and merch sales are likely to make a label artist more than download sales. Ticket sales also help get artists more gigs. Bands tour because they make more money than if they only tried to sell records (in any medium).
But depending on the band, touring can even just be for the fun of it, where break-even is a victory. And then there’s the whole pay-2-play, where you get nothing of the tickets, and instead pay to be support.
It’s really not as simple or homogenous as people make it seem.
That really depends on the label.
I vividly remember the moment when I turned on them: as soon as I started to have income during the 90's I used it on music. I was buying at least 5 or 6 CDs a week, I was tracking new releases obsessively and was making it a principle to pay for music. When MP3 exploded I started to encode the music I was buying, because that's pretty much how and where I was listening to it: on my various devices. But when the music industry started to feel the heat from the Napster and Limewire alike they reacted in the stupidest possible way: being user hostile and considering their own clients as potential thieves. The various copy protection systems they came up with started to be annoying but the nail in the coffin for me was a Jay Jay Johanson album that I simply could not play on any of my devices because of this. I gave them the middle finger and started to download, right this moment, without remorse. I only came back to paying when streaming started to be easier and better than downloading.
The music industry is mostly just disgusting pigs only worthy of contempt and disdain.