I joke, of course, and I'm a big Ramones fan. I've had numerous iterations of that shirt over the years. I often use them as an example when discussing "what is good art?" They are one of the most influential bands of all time and yet they were terrible musicians.
Here's Bill Withers on selling out: “Sellout… I’m not crazy about the word. We’re all entrepreneurs. To me, I don’t care if you own a furniture store or whatever – the best sign you can put up is SOLD OUT.”
how much of the revenue derived from those listens turn into commission to the musicians?
Those t-shirt sales came about because of those listens, so even tho the music wasn't as revenue generating, it acts as the biggest funnel.