Commissions, grants, advertisements, sponsorships, donations, teaching... There's already an enormous ecosystem of artists and authors who work outside of the copyright realm (blog writers, substackers, social media artists, youtube creators, soundcloud rappers) and who make money enough to pursue their passion and whose business model would be totally unchanged if copyright were abolished entirely tomorrow. When their work is downloaded or shared or copied or linked or edited or remixed they appreciate it and see it as a multiplication of their artistic impact.