I wonder how many supporters simply pledge and forget about it. I remember a game where the dev had really abandonned ship and 6 months later there was still a core of supporters with pledges.Yup, his brain dead patreon supporters are the root cause of all of it. They've already proven they are willing to give him free money for no content and they have already proven they believe and understand everything he says. He knows he can dick around for months and not see any negative consequence. If 50% of his patreon supports dropped him we'd see an update in a week.
Or maybe some people have so much money that it's to much effort just clicking on the button to stop it.