It wouldn’t be $0, because creators make money without selling their work: Patreon, commissions, even ads/sponsorships (though not ideal). Most creators I know, all their main work is already free.
Not linking the author's name and patreon is a problem, but I don't think it needs laws and definitely not copyright; if somebody gets the video on the other place to link the original author's patreon, even if they're not who uploaded it, it benefits them and I don't see any serious issue.