This is a comic made by someone that’s never bought music on Bandcamp. Bandcamp takes a 15% or 10% cut, depending on your sales ( https://bandcamp.com/pricing ) but it would appear most of the money goes to the artist.
I buy a lot of music on Bandcamp, and an artist using it makes me want to support them all the more. Spread the word! Everyone use Bandcamp!
(Unless it secretly sucks and I just don’t know it!)