As a creator on Patreon, you can always make posts that are sent to all of your patrons. So you can just make a post on Patreon saying "Hey, I'm shutting this d

As a creator on Patreon, you can always make posts that are sent to all of your patrons. So you can just make a post on Patreon saying "Hey, I'm shutting this down and moving to [other platform] instead" and all your patrons will see it. Whether they follow you to the new platform is up to them, of course. I've seen at least one creator that I support do exactly this, moving to Ko-Fi. I followed them, but I don't think Ko-Fi publicly shows the total monthly donations a person receives, so I have no idea what the attrition rate was on the migration.