or you could put a demo then a link to your patreon like ever other creator on the platform. You could also warn its a patreon only version before you make us sign up
This isn't that hard to figure out. Have a demo here with a link to the patreon with full version on it
VS
a game that does nothing that you have to make an account for to get told you have to go to the patreon to get the full version