Not consistently, but there have been a few months this year where I have hit $500 selling individual commercial use licenses for my tiling window manager[1]

https://lgug2z.com/software/komorebi

Nice licensing

I'd buy it for a 20 USD one-time fee

The experiment is end-user mediated wealth redistribution from large corporations by leveraging reimbursement mechanisms, and so far I'm content with the results

I like this, bookmarked in case I'll ever be forced by work into MICROS~1 operating systems again.