I dont think its quite that simple when it comes to Patreon. Most people subscribe because they want to support the dev, not because they want access to locked content. Putting a game out entirely for free means that more people will play it, fall in love with it, and then consider becoming a patron. Having your game out for free costs you up front sales but massively broadens your reach. If you're an established dev, maybe it makes more sense to focus on steam sales. If no one knows you or your games then I would say put it out for free to build a rep and fan base. Just my 2 cents.