Honestly for Chaos Dwarfs alone I don’t think many people would be interested, using services like DoxDirect is really best suited to bigger books, they get better value per page.
I know that I myself am interested in making more PDFs for homebrew/legacy hybrids and fancifying the legacy PDFs, but that’s just me and I’m not really intending to print stuff.
I also had an idea the other day of making a homebrew PDF for all of the Brazen Basterds, which I think would be really cool to put art, lore, and rules all into.